CVE-2026-95105 (GCVE-0-2026-95105)
Vulnerability from cvelistv5
Published
2026-10-06 08:37
Modified
2026-10-06 11:40
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-649 - Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking
Summary
Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.
Cloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.
This issue affects cloak: from 0.1.0-pre onward.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| danielberkompas | cloak |
Version: 0.1.0-pre ≤ cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:* |
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-95105",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-06T11:37:58.212117Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T11:40:42.775Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://cna.erlef.org/cves/CVE-2026-95105.html"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027",
"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027"
],
"packageName": "cloak",
"packageURL": "pkg:hex/cloak",
"product": "cloak",
"programFiles": [
"lib/cloak/ciphers/aes_ctr.ex",
"lib/cloak/ciphers/deprecated/aes_ctr.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:encrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:decrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027:decrypt/2"
}
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "0.1.0-pre",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027",
"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027"
],
"packageName": "danielberkompas/cloak",
"packageURL": "pkg:github/danielberkompas/cloak",
"product": "cloak",
"programFiles": [
"lib/cloak/ciphers/aes_ctr.ex",
"lib/cloak/ciphers/deprecated/aes_ctr.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:encrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:decrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027:decrypt/2"
}
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "2bd17019e285b55c5c218cc842537bf9280f24c3",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*",
"versionStartIncluding": "0.1.0-pre",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "reporter",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "coordinator",
"value": "Jonatan M\u00e4nnchen / EEF"
}
],
"dateAssigned": "2026-10-06T08:37:34.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eReliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eCloak.Ciphers.AES.CTR\u003c/code\u003e encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. \u003ccode\u003edecrypt/2\u003c/code\u003e checks only the key tag and the minimum length before it returns the plaintext, and \u003ccode\u003eCloak.Ciphers.Deprecated.AES.CTR\u003c/code\u003e decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\u003c/p\u003e\n\u003cp\u003eThis issue affects cloak: from 0.1.0-pre onward.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\n\n`Cloak.Ciphers.AES.CTR` encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. `decrypt/2` checks only the key tag and the minimum length before it returns the plaintext, and `Cloak.Ciphers.Deprecated.AES.CTR` decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\n\nThis issue affects cloak: from 0.1.0-pre onward."
}
],
"value": "Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\n\nCloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\n\nThis issue affects cloak: from 0.1.0-pre onward."
}
],
"impacts": [
{
"capecId": "CAPEC-39",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value."
}
],
"value": "An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value."
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-649",
"description": "CWE-649 Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T08:37:56.987Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"name": "EEF CNA record for CVE-2026-95105",
"tags": [
"related",
"third-party-advisory"
],
"url": "https://cna.erlef.org/cves/CVE-2026-95105.html"
},
{
"name": "OSV record EEF-CVE-2026-95105",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-95105"
},
{
"name": "Introducing commit 2bd1701 in danielberkompas/cloak",
"tags": [
"related"
],
"url": "https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Cloak AES-CTR cipher lacks ciphertext authentication, allowing chosen-plaintext forgery by bit flipping",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eConfigure the vault with \u003ccode\u003eCloak.Ciphers.AES.GCM\u003c/code\u003e as the default cipher and re-encrypt existing values, for example with the \u003ccode\u003ecloak.migrate.ecto\u003c/code\u003e task from cloak_ecto. Then remove \u003ccode\u003eCloak.Ciphers.AES.CTR\u003c/code\u003e and \u003ccode\u003eCloak.Ciphers.Deprecated.AES.CTR\u003c/code\u003e from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Configure the vault with `Cloak.Ciphers.AES.GCM` as the default cipher and re-encrypt existing values, for example with the `cloak.migrate.ecto` task from cloak_ecto. Then remove `Cloak.Ciphers.AES.CTR` and `Cloak.Ciphers.Deprecated.AES.CTR` from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values."
}
],
"value": "Configure the vault with Cloak.Ciphers.AES.GCM as the default cipher and re-encrypt existing values, for example with the cloak.migrate.ecto task from cloak_ecto. Then remove Cloak.Ciphers.AES.CTR and Cloak.Ciphers.Deprecated.AES.CTR from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values."
}
],
"x_proofOfConcept": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003col\u003e\n\u003cli\u003eEncrypt \u003ccode\u003e\"role=user \"\u003c/code\u003e with \u003ccode\u003eCloak.Ciphers.AES.CTR.encrypt/2\u003c/code\u003e and a random 32-byte key.\u003c/li\u003e\n\u003cli\u003eWithout the key, XOR the last 10 bytes of the result (the ciphertext body) with \u003ccode\u003e:crypto.exor(\"role=user \", \"role=admin\")\u003c/code\u003e. Leave the key tag and the IV unchanged.\u003c/li\u003e\n\u003cli\u003eCall \u003ccode\u003eCloak.Ciphers.AES.CTR.decrypt/2\u003c/code\u003e on the modified value. It returns \u003ccode\u003e{:ok, \"role=admin\"}\u003c/code\u003e.\u003c/li\u003e\n\u003c/ol\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "1. Encrypt `\"role=user \"` with `Cloak.Ciphers.AES.CTR.encrypt/2` and a random 32-byte key.\n2. Without the key, XOR the last 10 bytes of the result (the ciphertext body) with `:crypto.exor(\"role=user \", \"role=admin\")`. Leave the key tag and the IV unchanged.\n3. Call `Cloak.Ciphers.AES.CTR.decrypt/2` on the modified value. It returns `{:ok, \"role=admin\"}`."
}
],
"value": "* Encrypt \"role=user \" with Cloak.Ciphers.AES.CTR.encrypt/2 and a random 32-byte key.\n* Without the key, XOR the last 10 bytes of the result (the ciphertext body) with :crypto.exor(\"role=user \", \"role=admin\"). Leave the key tag and the IV unchanged.\n* Call Cloak.Ciphers.AES.CTR.decrypt/2 on the modified value. It returns {:ok, \"role=admin\"}."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-95105",
"datePublished": "2026-10-06T08:37:56.987Z",
"dateReserved": "2026-09-25T07:00:01.880Z",
"dateUpdated": "2026-10-06T11:40:42.775Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-95105\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-06T11:37:58.212117Z\"}}}], \"references\": [{\"url\": \"https://cna.erlef.org/cves/CVE-2026-95105.html\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-06T11:40:24.528Z\"}}], \"cna\": {\"title\": \"Cloak AES-CTR cipher lacks ciphertext authentication, allowing chosen-plaintext forgery by bit flipping\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Peter Ullrich\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Peter Ullrich\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Jonatan M\\u00e4nnchen / EEF\"}], \"impacts\": [{\"capecId\": \"CAPEC-39\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eAn attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value.\", \"base64\": false}]}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 8.2, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/danielberkompas/cloak\", \"vendor\": \"danielberkompas\", \"modules\": [\"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027\", \"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027\"], \"product\": \"cloak\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.1.0-pre\", \"lessThan\": \"*\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/cloak\", \"packageName\": \"cloak\", \"programFiles\": [\"lib/cloak/ciphers/aes_ctr.ex\", \"lib/cloak/ciphers/deprecated/aes_ctr.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:encrypt/2\"}, {\"name\": \"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:decrypt/2\"}, {\"name\": \"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027:decrypt/2\"}]}, {\"cpes\": [\"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/danielberkompas/cloak\", \"vendor\": \"danielberkompas\", \"modules\": [\"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027\", \"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027\"], \"product\": \"cloak\", \"versions\": [{\"status\": \"affected\", \"version\": \"2bd17019e285b55c5c218cc842537bf9280f24c3\", \"lessThan\": \"*\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/danielberkompas/cloak\", \"packageName\": \"danielberkompas/cloak\", \"programFiles\": [\"lib/cloak/ciphers/aes_ctr.ex\", \"lib/cloak/ciphers/deprecated/aes_ctr.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:encrypt/2\"}, {\"name\": \"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:decrypt/2\"}, {\"name\": \"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027:decrypt/2\"}]}], \"references\": [{\"url\": \"https://cna.erlef.org/cves/CVE-2026-95105.html\", \"name\": \"EEF CNA record for CVE-2026-95105\", \"tags\": [\"related\", \"third-party-advisory\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-95105\", \"name\": \"OSV record EEF-CVE-2026-95105\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3\", \"name\": \"Introducing commit 2bd1701 in danielberkompas/cloak\", \"tags\": [\"related\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Configure the vault with Cloak.Ciphers.AES.GCM as the default cipher and re-encrypt existing values, for example with the cloak.migrate.ecto task from cloak_ecto. Then remove Cloak.Ciphers.AES.CTR and Cloak.Ciphers.Deprecated.AES.CTR from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eConfigure the vault with \u003ccode\u003eCloak.Ciphers.AES.GCM\u003c/code\u003e as the default cipher and re-encrypt existing values, for example with the \u003ccode\u003ecloak.migrate.ecto\u003c/code\u003e task from cloak_ecto. Then remove \u003ccode\u003eCloak.Ciphers.AES.CTR\u003c/code\u003e and \u003ccode\u003eCloak.Ciphers.Deprecated.AES.CTR\u003c/code\u003e from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Configure the vault with `Cloak.Ciphers.AES.GCM` as the default cipher and re-encrypt existing values, for example with the `cloak.migrate.ecto` task from cloak_ecto. Then remove `Cloak.Ciphers.AES.CTR` and `Cloak.Ciphers.Deprecated.AES.CTR` from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values.\", \"base64\": false}]}], \"dateAssigned\": \"2026-10-06T08:37:34.000Z\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\\n\\nCloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\\n\\nThis issue affects cloak: from 0.1.0-pre onward.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eReliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\u003c/p\u003e\\n\u003cp\u003e\u003ccode\u003eCloak.Ciphers.AES.CTR\u003c/code\u003e encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. \u003ccode\u003edecrypt/2\u003c/code\u003e checks only the key tag and the minimum length before it returns the plaintext, and \u003ccode\u003eCloak.Ciphers.Deprecated.AES.CTR\u003c/code\u003e decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\u003c/p\u003e\\n\u003cp\u003eThis issue affects cloak: from 0.1.0-pre onward.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\\n\\n`Cloak.Ciphers.AES.CTR` encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. `decrypt/2` checks only the key tag and the minimum length before it returns the plaintext, and `Cloak.Ciphers.Deprecated.AES.CTR` decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\\n\\nThis issue affects cloak: from 0.1.0-pre onward.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-649\", \"description\": \"CWE-649 Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"0.1.0-pre\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-10-06T08:37:56.987Z\"}, \"x_proofOfConcept\": [{\"lang\": \"en\", \"value\": \"* Encrypt \\\"role=user \\\" with Cloak.Ciphers.AES.CTR.encrypt/2 and a random 32-byte key.\\n* Without the key, XOR the last 10 bytes of the result (the ciphertext body) with :crypto.exor(\\\"role=user \\\", \\\"role=admin\\\"). Leave the key tag and the IV unchanged.\\n* Call Cloak.Ciphers.AES.CTR.decrypt/2 on the modified value. It returns {:ok, \\\"role=admin\\\"}.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003col\u003e\\n\u003cli\u003eEncrypt \u003ccode\u003e\\\"role=user \\\"\u003c/code\u003e with \u003ccode\u003eCloak.Ciphers.AES.CTR.encrypt/2\u003c/code\u003e and a random 32-byte key.\u003c/li\u003e\\n\u003cli\u003eWithout the key, XOR the last 10 bytes of the result (the ciphertext body) with \u003ccode\u003e:crypto.exor(\\\"role=user \\\", \\\"role=admin\\\")\u003c/code\u003e. Leave the key tag and the IV unchanged.\u003c/li\u003e\\n\u003cli\u003eCall \u003ccode\u003eCloak.Ciphers.AES.CTR.decrypt/2\u003c/code\u003e on the modified value. It returns \u003ccode\u003e{:ok, \\\"role=admin\\\"}\u003c/code\u003e.\u003c/li\u003e\\n\u003c/ol\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"1. Encrypt `\\\"role=user \\\"` with `Cloak.Ciphers.AES.CTR.encrypt/2` and a random 32-byte key.\\n2. Without the key, XOR the last 10 bytes of the result (the ciphertext body) with `:crypto.exor(\\\"role=user \\\", \\\"role=admin\\\")`. Leave the key tag and the IV unchanged.\\n3. Call `Cloak.Ciphers.AES.CTR.decrypt/2` on the modified value. It returns `{:ok, \\\"role=admin\\\"}`.\", \"base64\": false}]}]}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-95105\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-06T11:40:42.775Z\", \"dateReserved\": \"2026-09-25T07:00:01.880Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-10-06T08:37:56.987Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…