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CVE-2021-33503

Published: Jun 29, 2021

Modified: Aug 3, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

FEDORA-2021-a6bde7ab18

vendor-advisory

x_refsource_FEDORA

FEDORA-2021-9c5f3b8aae

vendor-advisory

x_refsource_FEDORA

vendor-advisory

x_refsource_GENTOO

https://www.oracle.com/security-alerts/cpuoct2021.html

x_refsource_MISC

https://github.com/advisories/GHSA-q2q7-5pp4-w6pg

x_refsource_CONFIRM

https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec

x_refsource_CONFIRM

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