CVE search · CVE-2021-33503
CVE-2021-33503
high 7.5
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.
Details
- Status
- Modified
- Published
- Last changed
- Source
- cve@mitre.org
- Weakness
- CWE-400
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | high 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
nvd@nist.govPrimary |
| CVSS 2.0 | medium 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- python · urllib3
- fedoraproject · fedora
- oracle · enterprise_manager_ops_center
- oracle · instantis_enterprisetrack
- oracle · zfs_storage_appliance_kit
References
- https://github.com/advisories/GHSA-q2q7-5pp4-w6pgThird Party Advisory
- https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ecPatchThird Party Advisory
- 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.gentoo.org/glsa/202107-36Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory
- https://github.com/advisories/GHSA-q2q7-5pp4-w6pgThird Party Advisory
- https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ecPatchThird Party Advisory
- 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.gentoo.org/glsa/202107-36Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory