Vulnerability-Lookup

GSD-2019-25160

Vulnerability from gsd - Updated: 2024-02-27 06:04

Details

In the Linux kernel, the following vulnerability has been resolved: netlabel: fix out-of-bounds memory accesses There are two array out-of-bounds memory accesses, one in cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both errors are embarassingly simple, and the fixes are straightforward. As a FYI for anyone backporting this patch to kernels prior to v4.8, you'll want to apply the netlbl_bitmap_walk() patch to cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before Linux v4.8.

Aliases

CVE-2019-25160

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      "remediation": "unknown",
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CVE-2019-25160 (GCVE-0-2019-25160)

Vulnerability from cvelistv5 – Published: 2024-02-26 17:20 – Updated: 2026-08-05 08:43

Title

netlabel: fix out-of-bounds memory accesses

Summary

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-02-27 16:02 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/97bc3683c24999ee6…
https://git.kernel.org/stable/c/c61d01faa5550e067…
https://git.kernel.org/stable/c/dc18101f95fa6e815…
https://git.kernel.org/stable/c/1c973f9c7cc2b3caa…
https://git.kernel.org/stable/c/fcfe700acdc1c72ea…
https://git.kernel.org/stable/c/e3713abc4248aa6bc…
https://git.kernel.org/stable/c/fbf9578919d6c9110…
https://git.kernel.org/stable/c/5578de4834fe0f2a3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < 97bc3683c24999ee621d847c9348c75d2fe86272 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < c61d01faa5550e06794dcf86125ccd325bfad950 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < dc18101f95fa6e815f426316b8b9a5cee28a334e (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < 1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < fcfe700acdc1c72eab231300e82b962bac2b2b2c (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < e3713abc4248aa6bcc11173d754c418b02a62cbb (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < fbf9578919d6c91100ec63acf2cba641383f6c78 (git) Affected: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6 , < 5578de4834fe0f2a34fedc7374be691443396d1f (git)
Linux	Linux	Affected: 2.6.19 Unaffected: 0 , < 2.6.19 (semver) Unaffected: 3.16.66 , ≤ 3.16.* (semver) Unaffected: 3.18.137 , ≤ 3.18.* (semver) Unaffected: 4.4.177 , ≤ 4.4.* (semver) Unaffected: 4.9.163 , ≤ 4.9.* (semver) Unaffected: 4.14.106 , ≤ 4.14.* (semver) Unaffected: 4.19.28 , ≤ 4.19.* (semver) Unaffected: 4.20.15 , ≤ 4.20.* (semver) Unaffected: 5.0 , ≤ * (original_commit_for_fix)

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              "version": "446fda4f26822b2d42ab3396aafcedf38a9ff2b6",
              "versionType": "git"
            },
            {
              "lessThan": "5578de4834fe0f2a34fedc7374be691443396d1f",
              "status": "affected",
              "version": "446fda4f26822b2d42ab3396aafcedf38a9ff2b6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/cipso_ipv4.c",
            "net/netlabel/netlabel_kapi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.19"
            },
            {
              "lessThan": "2.6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "3.16.*",
              "status": "unaffected",
              "version": "3.16.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "3.18.*",
              "status": "unaffected",
              "version": "3.18.137",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.20.*",
              "status": "unaffected",
              "version": "4.20.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "3.16.66",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "3.18.137",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.4.177",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.163",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.106",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.28",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.20.15",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.0",
                  "versionStartIncluding": "2.6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlabel: fix out-of-bounds memory accesses\n\nThere are two array out-of-bounds memory accesses, one in\ncipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk().  Both\nerrors are embarassingly simple, and the fixes are straightforward.\n\nAs a FYI for anyone backporting this patch to kernels prior to v4.8,\nyou\u0027ll want to apply the netlbl_bitmap_walk() patch to\ncipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn\u0027t exist before\nLinux v4.8."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Crafted IPv4 packets with CIPSO options reach the bug via ip_rcv_finish_core -\u003e ip_rcv_options -\u003e ip_options_compile -\u003e cipso_v4_validate -\u003e cipso_v4_map_lvl_valid/netlbl_bitmap_walk, with no local access required. This is a net/ stack path processing remote peer packet data.\nAC:L - With a CIPSO MAP_TRANS DOI configured (the labeled-networking deployment this subsystem targets), an attacker reliably triggers the OOB by setting an out-of-range level byte or category bitmap; DOI values are probeable via ICMP parameter-problem offsets. No race or other attacker-uncontrollable condition is required.\nPR:N - Incoming skbs take the CIPSO path in __ip_options_compile without CAP_NET_RAW or any authentication; the privilege check applies only when skb is NULL (setsockopt). A remote unauthenticated sender can trigger the vulnerable validation.\nUI:N - Exploitation requires only sending crafted IP packets to the host; no victim user action is needed.\nS:U - Impact is confined to the receiving kernel\u0027s NetLabel/CIPSO processing and memory; there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - cipso_v4_map_lvl_valid indexes an attacker-controlled u8 into the DOI level array without a size check, enabling a large kernel heap OOB read (up to ~1KB when cipso_size is small). Per guidance, unbounded OOB reads score Confidentiality High.\nI:N - Both defects are out-of-bounds reads with no write, UAF, or control-flow corruption primitive; later map_lvl_ntoh still bounds-checks before applying labels, so there is no integrity impact.\nA:H - The OOB reads can fault on unmapped pages and cause a kernel oops/panic, and a remote attacker can trigger them repeatedly for DoS against CIPSO-enabled hosts."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:43:45.278Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/97bc3683c24999ee621d847c9348c75d2fe86272"
        },
        {
          "url": "https://git.kernel.org/stable/c/c61d01faa5550e06794dcf86125ccd325bfad950"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc18101f95fa6e815f426316b8b9a5cee28a334e"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000"
        },
        {
          "url": "https://git.kernel.org/stable/c/fcfe700acdc1c72eab231300e82b962bac2b2b2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3713abc4248aa6bcc11173d754c418b02a62cbb"
        },
        {
          "url": "https://git.kernel.org/stable/c/fbf9578919d6c91100ec63acf2cba641383f6c78"
        },
        {
          "url": "https://git.kernel.org/stable/c/5578de4834fe0f2a34fedc7374be691443396d1f"
        }
      ],
      "title": "netlabel: fix out-of-bounds memory accesses",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2019-25160",
    "datePublished": "2024-02-26T17:20:19.490Z",
    "dateReserved": "2024-02-26T17:07:20.465Z",
    "dateUpdated": "2026-08-05T08:43:45.278Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

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.

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GSD-2019-25160

CVE-2019-25160 (GCVE-0-2019-25160)

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Sightings

Nomenclature

Related by attack behaviour