CVE-2021-33503

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-33503

Severity

7.5

High

CVSS V3

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Description

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

References

https://nvd.nist.gov/vuln/detail/CVE-2021-33503
https://github.com/advisories/GHSA-q2q7-5pp4-w6pg
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/
https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec
https://security.gentoo.org/glsa/202107-36
https://www.oracle.com/security-alerts/cpuoct2021.html

Affected packages

Advisories are based on vulnerability information provided by Grype from Anchore. Learn how Chainguard creates security advisories.

CVE-2021-33503

Severity

Description

References

Affected packages

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