| Name | CVE-2021-4235 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3479-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| golang-yaml.v2 (PTS) | buster | 2.2.2-1 | vulnerable |
| buster (security) | 2.2.2-1+deb10u1 | fixed | |
| bullseye | 2.4.0-1 | fixed | |
| sid, trixie, bookworm | 2.4.0-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| golang-yaml.v2 | source | buster | 2.2.2-1+deb10u1 | DLA-3479-1 | ||
| golang-yaml.v2 | source | (unstable) | 2.2.8-1 |
https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241 (v2.2.3)
https://github.com/go-yaml/yaml/pull/375
https://pkg.go.dev/vuln/GO-2021-0061