ubuntu-cve-2023-22485
Vulnerability from osv_ubuntu
Published
2023-01-24 01:15
Modified
2026-04-22 07:45
Summary
Details

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the validate_protocol function. We believe this bug is harmless in practice, because the out-of-bounds read accesses malloc metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cmark-gfm",
            "binary_version": "0.29.0.gfm.0-4ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcmark-gfm-extensions0",
            "binary_version": "0.29.0.gfm.0-4ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcmark-gfm0",
            "binary_version": "0.29.0.gfm.0-4ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "cmark-gfm",
        "purl": "pkg:deb/ubuntu/cmark-gfm@0.29.0.gfm.0-4ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.28.3.gfm.20-3",
        "0.29.0.gfm.0-3",
        "0.29.0.gfm.0-4",
        "0.29.0.gfm.0-4ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cmark-gfm",
            "binary_version": "0.29.0.gfm.3-3"
          },
          {
            "binary_name": "libcmark-gfm-extensions0.29.0.gfm.3",
            "binary_version": "0.29.0.gfm.3-3"
          },
          {
            "binary_name": "libcmark-gfm0.29.0.gfm.3",
            "binary_version": "0.29.0.gfm.3-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "cmark-gfm",
        "purl": "pkg:deb/ubuntu/cmark-gfm@0.29.0.gfm.3-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.29.0.gfm.0-6",
        "0.29.0.gfm.2-1",
        "0.29.0.gfm.2-1+really.0.29.0.gfm.0ubuntu1",
        "0.29.0.gfm.2-2",
        "0.29.0.gfm.3-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cmark-gfm",
            "binary_version": "0.29.0.gfm.6-6build1"
          },
          {
            "binary_name": "libcmark-gfm-extensions0.29.0.gfm.6",
            "binary_version": "0.29.0.gfm.6-6build1"
          },
          {
            "binary_name": "libcmark-gfm0.29.0.gfm.6",
            "binary_version": "0.29.0.gfm.6-6build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "cmark-gfm",
        "purl": "pkg:deb/ubuntu/cmark-gfm@0.29.0.gfm.6-6build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.29.0.gfm.6-6",
        "0.29.0.gfm.6-6build1"
      ]
    }
  ],
  "aliases": [],
  "details": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the `validate_protocol` function. We believe this bug is harmless in practice, because the out-of-bounds read accesses `malloc` metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7.",
  "id": "UBUNTU-CVE-2023-22485",
  "modified": "2026-04-22T07:45:13Z",
  "published": "2023-01-24T01:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-22485"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvr"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-22485"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-22485"
  ]
}



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