Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1jMjRmLTJqM2ctcmc0OM4AAyMi

kaml has potential denial of service while parsing input with anchors and aliases

Impact

Applications that use kaml to parse untrusted input containing anchors and aliases may consume excessive memory and crash.

Patches

Version 0.53.0 and later default to refusing to parse YAML documents containing anchors and aliases.

Workarounds

None.

References

Wikipedia has an explanation of this class of vulnerability: billion laughs attack

Acknowledgements

Thank you to @gdude2002 for reporting this issue.

Permalink: https://github.com/advisories/GHSA-c24f-2j3g-rg48
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jMjRmLTJqM2ctcmc0OM4AAyMi
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: almost 2 years ago
Updated: almost 2 years ago

CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Percentage: 0.00159
EPSS Percentile: 0.52801

Identifiers: GHSA-c24f-2j3g-rg48, CVE-2023-28118
References:

• https://github.com/charleskorn/kaml/security/advisories/GHSA-c24f-2j3g-rg48
• https://nvd.nist.gov/vuln/detail/CVE-2023-28118
• https://github.com/charleskorn/kaml/commit/5f82a2d7e00bfc307afca05d1dc4d7c50593531a
• https://github.com/charleskorn/kaml/releases/tag/0.53.0
• https://github.com/advisories/GHSA-c24f-2j3g-rg48

Repository: https://github.com/charleskorn/kaml
Blast Radius: 16.7

Affected Packages