Vulnerability Details : CVE-2023-24824
cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either large numbers of `>` or `-` characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised to upgrade. Users unable to upgrade should validate that their input comes from trusted sources.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2023-24824
Probability of exploitation activity in the next 30 days: 0.07%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 30 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2023-24824
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2023-24824
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: security-advisories@github.com (Primary)
-
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-24824
-
https://github.com/github/cmark-gfm/commit/2300c1bd2c8226108885bf019655c4159cf26b59
Merge pull request from GHSA-66g8-4hjf-77xh · github/cmark-gfm@2300c1b · GitHubPatch
-
https://github.com/github/cmark-gfm/security/advisories/GHSA-66g8-4hjf-77xh
Quadratic complexity bugs may lead to a denial of service · Advisory · github/cmark-gfm · GitHubExploit;Vendor Advisory
Products affected by CVE-2023-24824
- cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*