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    CVE-2023-22485

    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.

    Published:Jan 24, 2023
    Last Modified:Mar 10, 2025
    EPS:Jan 24, 2023
    EPSS Score:0.00291
    CVSS Score:5.3

    Affected Products

    Vendor
    Github
    Product
    Cmark-gfm

    Exploits

    https://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvrhttps://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvr

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-250 XML Injection
    CAPEC-540 Overread Buffers
    CAPEC-83 XPath Injection

    Related CVEs

    CVE-2024-22051 (CVSS 9.8) — CommonMarker versions prior to 0.23.4 are at risk of an integer overflow vulnerability. This vulnerability can…
    CVE-2023-37463 (CVSS 6.4) — cmark-gfm is an extended version of the C reference implementation of CommonMark, a rationalized version of Ma…
    CVE-2023-24824 (CVSS 5.3) — cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial…
    CVE-2023-26485 (CVSS 5.3) — cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial…
    CVE-2023-22486 (CVSS 3.5) — cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions pri…
    CVE-2023-22484 (CVSS 3.5) — cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions pri…
    CVE-2023-22483 (CVSS 3.5) — cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions pri…
    CVE-2022-39209 (CVSS 7.5) — cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions …
    CVE-2022-24724 (CVSS 8.8) — cmark-gfm is GitHub's extended version of the C reference implementation of CommonMark. Prior to versions 0.29…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High