Skip to content

Excessive output when parsing Markdown (GHSL-2023-048)

Moderate
kivikakk published GHSA-xxmq-4vph-956w Mar 28, 2023

Package

cargo comrak (Rust)

Affected versions

< 0.17.0

Patched versions

0.17.0

Description

Impact

comrak is vulnerable to the upstream cmark issue, "Issue revealed by fuzzer". A large number of references in a markdown document can trigger an overly large response.

Patches

0.17.0 contains 70f97f3, which limits reference output to a 100Kb maximum.

Workarounds

n/a

References

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVE ID

No known CVE

Weaknesses

No CWEs

Credits