CVE-2023-3107 (GCVE-0-2023-3107)
Vulnerability from cvelistv5 – Published: 2023-08-01 22:01 – Updated: 2025-07-09 13:45
VLAI
EPSS
VEX
Title
Remote denial of service in IPv6 fragment reassembly
Summary
A set of carefully crafted ipv6 packets can trigger an integer overflow in the calculation of a fragment reassembled packet's payload length field. This allows an attacker to trigger a kernel panic, resulting in a denial of service.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 14:17 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
freebsd
CNA
References
2 references
| URL | Tags |
|---|---|
| https://security.FreeBSD.org/advisories/FreeBSD-S… | vendor-advisory |
| https://security.netapp.com/advisory/ntap-2023080… |
Impacted products
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T06:48:07.287Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:06.ipv6.asc"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20230804-0001/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-3107",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T14:17:58.945668Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-07-09T13:45:34.790Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"ipv6"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "13.2-RELEASE-p2",
"status": "affected",
"version": "13.2-RELEASE",
"versionType": "release"
},
{
"lessThan": "13.1-RELEASE-p9",
"status": "affected",
"version": "13.1-RELEASE",
"versionType": "release"
},
{
"lessThan": "12.4-RELEASE-p4",
"status": "affected",
"version": "12.4-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Zweig of Kunlun Lab"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A set of carefully crafted ipv6 packets can trigger an integer overflow in the calculation of a fragment reassembled packet\u0027s payload length field. This allows an attacker to trigger a kernel panic, resulting in a denial of service.\u003cbr\u003e"
}
],
"value": "A set of carefully crafted ipv6 packets can trigger an integer overflow in the calculation of a fragment reassembled packet\u0027s payload length field. This allows an attacker to trigger a kernel panic, resulting in a denial of service."
}
],
"impacts": [
{
"capecId": "CAPEC-128",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-128 Integer Attacks"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190 Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-08-04T22:06:22.777Z",
"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:06.ipv6.asc"
},
{
"url": "https://security.netapp.com/advisory/ntap-20230804-0001/"
}
],
"source": {
"advisory": "FreeBSD-SA-23:06.ipv6",
"discovery": "UNKNOWN"
},
"title": "Remote denial of service in IPv6 fragment reassembly",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Users with IPv6 disabled on untrusted network interfaces are not affected. Such interfaces will have the IFDISABLED nd6 flag set in ifconfig(8).\u003cbr\u003e\u003cbr\u003eThe kernel may be configured to drop all IPv6 fragments by setting the net.inet6.ip6.maxfrags sysctl to 0. Doing so will prevent the bug from being triggered, with the caveat that legitimate IPv6 fragments will be dropped.\u003cbr\u003e\u003cbr\u003eIf the pf(4) firewall is enabled, and scrubbing and fragment reassembly is enabled on untrusted interfaces, the bug cannot be triggered. This is the default if pf(4) is enabled.\u003cbr\u003e"
}
],
"value": "Users with IPv6 disabled on untrusted network interfaces are not affected. Such interfaces will have the IFDISABLED nd6 flag set in ifconfig(8).\n\nThe kernel may be configured to drop all IPv6 fragments by setting the net.inet6.ip6.maxfrags sysctl to 0. Doing so will prevent the bug from being triggered, with the caveat that legitimate IPv6 fragments will be dropped.\n\nIf the pf(4) firewall is enabled, and scrubbing and fragment reassembly is enabled on untrusted interfaces, the bug cannot be triggered. This is the default if pf(4) is enabled."
}
],
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"assignerShortName": "freebsd",
"cveId": "CVE-2023-3107",
"datePublished": "2023-08-01T22:01:07.584Z",
"dateReserved": "2023-06-05T14:10:11.626Z",
"dateUpdated": "2025-07-09T13:45:34.790Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T06:48:07.287Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:06.ipv6.asc"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20230804-0001/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-3107",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T14:17:58.945668Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-10-22T14:18:25.494Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"ipv6"
],
"product": "FreeBSD",
"vendor": "FreeBSD",
"versions": [
{
"lessThan": "13.2-RELEASE-p2",
"status": "affected",
"version": "13.2-RELEASE",
"versionType": "release"
},
{
"lessThan": "13.1-RELEASE-p9",
"status": "affected",
"version": "13.1-RELEASE",
"versionType": "release"
},
{
"lessThan": "12.4-RELEASE-p4",
"status": "affected",
"version": "12.4-RELEASE",
"versionType": "release"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Zweig of Kunlun Lab"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A set of carefully crafted ipv6 packets can trigger an integer overflow in the calculation of a fragment reassembled packet\u0027s payload length field. This allows an attacker to trigger a kernel panic, resulting in a denial of service.\u003cbr\u003e"
}
],
"value": "A set of carefully crafted ipv6 packets can trigger an integer overflow in the calculation of a fragment reassembled packet\u0027s payload length field. This allows an attacker to trigger a kernel panic, resulting in a denial of service."
}
],
"impacts": [
{
"capecId": "CAPEC-128",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-128 Integer Attacks"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190 Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-08-04T22:06:22.777Z",
"orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"shortName": "freebsd"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:06.ipv6.asc"
},
{
"url": "https://security.netapp.com/advisory/ntap-20230804-0001/"
}
],
"source": {
"advisory": "FreeBSD-SA-23:06.ipv6",
"discovery": "UNKNOWN"
},
"title": "Remote denial of service in IPv6 fragment reassembly",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Users with IPv6 disabled on untrusted network interfaces are not affected. Such interfaces will have the IFDISABLED nd6 flag set in ifconfig(8).\u003cbr\u003e\u003cbr\u003eThe kernel may be configured to drop all IPv6 fragments by setting the net.inet6.ip6.maxfrags sysctl to 0. Doing so will prevent the bug from being triggered, with the caveat that legitimate IPv6 fragments will be dropped.\u003cbr\u003e\u003cbr\u003eIf the pf(4) firewall is enabled, and scrubbing and fragment reassembly is enabled on untrusted interfaces, the bug cannot be triggered. This is the default if pf(4) is enabled.\u003cbr\u003e"
}
],
"value": "Users with IPv6 disabled on untrusted network interfaces are not affected. Such interfaces will have the IFDISABLED nd6 flag set in ifconfig(8).\n\nThe kernel may be configured to drop all IPv6 fragments by setting the net.inet6.ip6.maxfrags sysctl to 0. Doing so will prevent the bug from being triggered, with the caveat that legitimate IPv6 fragments will be dropped.\n\nIf the pf(4) firewall is enabled, and scrubbing and fragment reassembly is enabled on untrusted interfaces, the bug cannot be triggered. This is the default if pf(4) is enabled."
}
],
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
"assignerShortName": "freebsd",
"cveId": "CVE-2023-3107",
"datePublished": "2023-08-01T22:01:07.584Z",
"dateReserved": "2023-06-05T14:10:11.626Z",
"dateUpdated": "2025-07-09T13:45:34.790Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.