CVE-2023-24824
Description
A flaw was found in CommonMarker. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service.
Statement
This vulnerability can cause a potential denial of service (DoS) issue, but it can be classified as Moderate rather than Important due to a few key factors. First, the vulnerability specifically targets input with large numbers of specific characters (> or -), which means it is highly context-dependent and unlikely to be triggered by typical use cases. In practice, the majority of markdown documents are unlikely to contain these patterns in excessive quantities. Furthermore, the issue requires input from untrusted or malicious sources to be exploited, as normal, well-formed markdown documents will not trigger the problem.
While the quadratic time complexity can lead to significant resource exhaustion under certain conditions, it does not inherently enable arbitrary code execution or direct access to sensitive system resources.
Mitigation
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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