CVE-2023-22485 cmark-gfm out-of-bounds read in validate_protocol

2023-01-2400:26:57

CWE-125

GitHub_M

www.cve.org

cve-2023-22485

cmark-gfm

out-of-bounds read

validate_protocol

github

commonmark

parsing

rendering

library

vulnerability

patched

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

5.8 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.3%

JSON

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.

CNA Affected

[
  {
    "vendor": "github",
    "product": "cmark-gfm",
    "versions": [
      {
        "version": "< 0.29.0.gfm.7",
        "status": "affected"
      }
    ]
  }
]