CVE-2021-33503

Name
CVE-2021-33503
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.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
CONFIRM https://github.com/advisories/GHSA-q2q7-5pp4-w6pg
CONFIRM https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec
Mailing List https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/
Mailing List https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/
Third Party Advisory https://security.gentoo.org/glsa/202107-36
MISC https://www.oracle.com/security-alerts/cpuoct2021.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:* urllib3 >= None < 1.26.5

Vulnerable and fixed packages

Source package Branch Version Maintainer Status