CVE-2022-24713

 

Published at: - 08-03-2022 08:15

Last modified: - 20-01-2023 07:05

Total changes: - 11

Description

regex is an implementation of regular expressions for the Rust language. The regex crate features built-in mitigations to prevent denial of service attacks caused by untrusted regexes, or untrusted input matched by trusted regexes. Those (tunable) mitigations already provide sane defaults to prevent attacks. This guarantee is documented and it's considered part of the crate's API. Unfortunately a bug was discovered in the mitigations designed to prevent untrusted regexes to take an arbitrary amount of time during parsing, and it's possible to craft regexes that bypass such mitigations. This makes it possible to perform denial of service attacks by sending specially crafted regexes to services accepting user-controlled, untrusted regexes. All versions of the regex crate before or equal to 1.5.4 are affected by this issue. The fix is include starting from regex 1.5.5. All users accepting user-controlled regexes are recommended to upgrade immediately to the latest version of the regex crate. Unfortunately there is no fixed set of problematic regexes, as there are practically infinite regexes that could be crafted to exploit this vulnerability. Because of this, it us not recommend to deny known problematic regexes.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://github.com/rust-lang/regex/security/advisories/GHSA-m5pq-gvj9-9vr8
• https://github.com/rust-lang/regex/commit/ae70b41d4f46641dbc45c7a4f87954aea356283e
• https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw
• FEDORA-2022-ceb3e03c5e-Mailing List, Third Party Advisory
• FEDORA-2022-8436ac4c39-Mailing List, Third Party Advisory
• FEDORA-2022-d20d44ba98-Mailing List, Third Party Advisory
• [debian-lts-announce] 20220407 [SECURITY] [DLA 2971-1] firefox-esr security update-Mailing List, Third Party Advisory
• DSA-5113-Third Party Advisory
• [debian-lts-announce] 20220411 [SECURITY] [DLA 2978-1] thunderbird security update-Mailing List, Third Party Advisory
• DSA-5118-Third Party Advisory
• GLSA-202208-14-Third Party Advisory
• GLSA-202208-08-Third Party Advisory

 

Keywords

NVD

 

CVE-2022-24713

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures