Vulnerability Description
Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.
CVSS Score
5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Yaml Project | Yaml | < 2.2.3 |
References
- https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241PatchThird Party Advisory
- https://github.com/go-yaml/yaml/pull/375ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html
- https://pkg.go.dev/vuln/GO-2021-0061Third Party Advisory
- https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241PatchThird Party Advisory
- https://github.com/go-yaml/yaml/pull/375ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html
- https://pkg.go.dev/vuln/GO-2021-0061Third Party Advisory
FAQ
What is CVE-2021-4235?
CVE-2021-4235 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.
How severe is CVE-2021-4235?
CVE-2021-4235 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4235?
Check the references section above for vendor advisories and patch information. Affected products include: Yaml Project Yaml.