GHSA-r88r-gmrh-7j83

YAML Go package vulnerable to denial of service

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-4235

Packages

Ecosystem	Package	Affected	Fixed in
Go	gopkg.in/yaml.v2	< 2.2.3	2.2.3
Go	github.com/go-yaml/yaml	<= 2.1.0	no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2021-4235 advisory
https://github.com/go-yaml/yaml/pull/375 web
https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241 web
https://github.com/go-yaml/yaml package
https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html web
https://pkg.go.dev/vuln/GO-2021-0061 web