CVE-2026-112377 (GCVE-0-2026-112377)
Vulnerability from cvelistv5
Published
2026-10-19 17:26
Modified
2026-10-20 17:39
CWE
  • CWE-346 - Origin Validation Error
Summary
CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party's nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data.
Impacted products
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-112377",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-20T17:39:34.340105Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-20T17:39:42.185Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/CCC-Attestation/attested-tls-poc",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/ccc-attestation/attested-tls-poc",
          "product": "attested-tls-poc",
          "repo": "https://github.com/CCC-Attestation/attested-tls-poc",
          "vendor": "CCC-Attestation",
          "versions": [
            {
              "lessThanOrEqual": "731ca82ed533fc7a1092be980887ae2e34261da2",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Muhammad Usama Sardar"
        }
      ],
      "datePublic": "2026-07-17T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party\u0027s nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T17:26:39.111Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Pull Request #58",
          "tags": [
            "patch",
            "technical-description",
            "issue-tracking"
          ],
          "url": "https://github.com/CCC-Attestation/attested-tls-poc/pull/58"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://datatracker.ietf.org/doc/draft-intra-handshake-fail/"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/muhammad-usama-sardar/intra-handshake.fail"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/CCC-Attestation/attested-tls-poc"
        },
        {
          "name": "VulnCheck Advisory: CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack"
        }
      ],
      "tags": [
        "unsupported-when-assigned"
      ],
      "title": "CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-112377",
    "datePublished": "2026-10-19T17:26:39.111Z",
    "dateReserved": "2026-10-19T16:30:42.240Z",
    "dateUpdated": "2026-10-20T17:39:42.185Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-10-19T17:26:39.111Z\"}, \"datePublic\": \"2026-07-17T00:00:00.000Z\", \"title\": \"CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party\u0027s nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data.\"}], \"tags\": [\"unsupported-when-assigned\"], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"Origin Validation Error\", \"cweId\": \"CWE-346\", \"type\": \"CWE\"}]}], \"affected\": [{\"vendor\": \"CCC-Attestation\", \"product\": \"attested-tls-poc\", \"collectionURL\": \"https://github.com/CCC-Attestation/attested-tls-poc\", \"packageURL\": \"pkg:github/ccc-attestation/attested-tls-poc\", \"repo\": \"https://github.com/CCC-Attestation/attested-tls-poc\", \"defaultStatus\": \"unaffected\", \"versions\": [{\"version\": \"0\", \"lessThanOrEqual\": \"731ca82ed533fc7a1092be980887ae2e34261da2\", \"status\": \"affected\", \"versionType\": \"git\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"vectorString\": \"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"HIGH\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"baseScore\": 9.1, \"baseSeverity\": \"CRITICAL\"}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"baseScore\": 7.4, \"baseSeverity\": \"HIGH\"}}], \"references\": [{\"url\": \"https://github.com/CCC-Attestation/attested-tls-poc/pull/58\", \"tags\": [\"patch\", \"technical-description\", \"issue-tracking\"], \"name\": \"Pull Request #58\"}, {\"url\": \"https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://datatracker.ietf.org/doc/draft-intra-handshake-fail/\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://github.com/muhammad-usama-sardar/intra-handshake.fail\", \"tags\": [\"technical-description\"]}, {\"url\": \"https://github.com/CCC-Attestation/attested-tls-poc\", \"tags\": [\"product\"]}, {\"name\": \"VulnCheck Advisory: CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack\", \"tags\": [\"third-party-advisory\"], \"url\": \"https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack\"}], \"credits\": [{\"lang\": \"en\", \"value\": \"Muhammad Usama Sardar\", \"type\": \"finder\"}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-112377\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-20T17:39:34.340105Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-20T17:39:38.739Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-112377\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"VulnCheck\", \"dateReserved\": \"2026-10-19T16:30:42.240Z\", \"datePublished\": \"2026-10-19T17:26:39.111Z\", \"dateUpdated\": \"2026-10-20T17:39:42.185Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

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…