CVE-2021-33503
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-33503
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33503.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-33503
- Aliases
- Related
- Published
- 2021-06-29T11:15:07Z
- Modified
- 2024-09-18T03:14:48.180306Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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://github.com/advisories/GHSA-q2q7-5pp4-w6pg
- https://security.gentoo.org/glsa/202107-36
- https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec
- https://www.oracle.com/security-alerts/cpuoct2021.html
- 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://security-tracker.debian.org/tracker/CVE-2021-33503
Affected packages
Debian:11 / python-urllib3
Package
- Name
- python-urllib3
- Purl
- pkg:deb/debian/python-urllib3?arch=source
Debian:12 / python-urllib3
Package
- Name
- python-urllib3
- Purl
- pkg:deb/debian/python-urllib3?arch=source
Debian:13 / python-urllib3
Package
- Name
- python-urllib3
- Purl
- pkg:deb/debian/python-urllib3?arch=source