CVE-2022-24713

HIGH
Published Mar 8, 20224y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 8, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-1333
CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 7

VendorProductVersionRange
rust-langregex* <1.5.5
fedoraprojectfedora34any
fedoraprojectfedora35any
fedoraprojectfedora36any
debiandebian_linux9.0any
debiandebian_linux10.0any
debiandebian_linux11.0any

References 12

  • github.com https://github.com/rust-lang/regex/commit/ae70b41d4f46641dbc45c7a4f87954aea356283e
    PatchThird Party Advisory
  • github.com https://github.com/rust-lang/regex/security/advisories/GHSA-m5pq-gvj9-9vr8
    Third Party Advisory
  • groups.google.com https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/04/msg00003.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/04/msg00009.html
    Mailing ListThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JANLZ3JXWJR7FSHE57K66UIZUIJZI67T/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3YB7CURSG64CIPCDPNMGPE4UU24AB6H/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PDOWTHNVGBOP2HN27PUFIGRYNSNDTYRJ/
  • security.gentoo.org https://security.gentoo.org/glsa/202208-08
    Third Party Advisory
  • security.gentoo.org https://security.gentoo.org/glsa/202208-14
    Third Party Advisory
  • debian.org https://www.debian.org/security/2022/dsa-5113
    Third Party Advisory
  • debian.org https://www.debian.org/security/2022/dsa-5118
    Third Party Advisory

Remediation

  • github.com https://github.com/rust-lang/regex/commit/ae70b41d4f46641dbc45c7a4f87954aea356283e
    PatchThird Party Advisory