Vulnerability Report

CVE-2022-24713

Title: Rust-Lang Regex Denial of Service (DoS)

Denial of Service (DoS)

Proof Of Concept

PoC Available for CVE-2022-24713

CWE Category CWE-1333
Published Date Mar 08, 2022
Modified Date Nov 21, 2024
Exploit Status Available
Score 7.5 CVSS v3.1
Exploit Probability (EPSS)
10.40%

Vulnerability Summary

CVE-2022-24713: 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.

Impacted Vendors

R
rust-lang 1

Reference Links

https://github.com/rust-lang/regex/commit/ae70b41d4f46641dbc45c7a4f87954aea356283e https://github.com/rust-lang/regex/security/advisories/GHSA-m5pq-gvj9-9vr8 https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw https://lists.debian.org/debian-lts-announce/2022/04/msg00003.html https://lists.debian.org/debian-lts-announce/2022/04/msg00009.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JANLZ3JXWJR7FSHE57K66UIZUIJZI67T/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3YB7CURSG64CIPCDPNMGPE4UU24AB6H/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PDOWTHNVGBOP2HN27PUFIGRYNSNDTYRJ/ https://security.gentoo.org/glsa/202208-08 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2022/dsa-5113 https://www.debian.org/security/2022/dsa-5118 https://github.com/rust-lang/regex/commit/ae70b41d4f46641dbc45c7a4f87954aea356283e https://github.com/rust-lang/regex/security/advisories/GHSA-m5pq-gvj9-9vr8 https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw https://lists.debian.org/debian-lts-announce/2022/04/msg00003.html https://lists.debian.org/debian-lts-announce/2022/04/msg00009.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JANLZ3JXWJR7FSHE57K66UIZUIJZI67T/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3YB7CURSG64CIPCDPNMGPE4UU24AB6H/ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PDOWTHNVGBOP2HN27PUFIGRYNSNDTYRJ/ https://security.gentoo.org/glsa/202208-08 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2022/dsa-5113 https://www.debian.org/security/2022/dsa-5118
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2022-24713 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/JPeisach/CVE-2022-24713-POC
View Code
MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.