CVE-2021-4235
Denial of service in gopkg.in/yaml.v2
5.5
MEDIUM
CVSS 3.1
EPSS 0.04%
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.
How to fix CVE-2021-4235
To remediate CVE-2021-4235, upgrade the affected package to a fixed version below.
- Debian/golang-yaml.v2—upgrade to 2.2.8-1 or later
- —upgrade to 2.2.2-1+deb10u1 or later
- —no fix listed
- —no fix listed
- —upgrade to 2.2.3 or later
- —upgrade to 2.2.3 or later
Is CVE-2021-4235 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 2.2.8-1
- from 0, < 2.2.2-1+deb10u1
- from 0, <= 2.1.0
- from 0
- from 0, < 2.2.3
- from 0, < 2.2.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |