CVE-2022-34749 — Regex Denial of Service in Project Mistune

CWE-1333 — Regex Denial of Service7 documents6 sources
Severity
7.5HIGHNVD
EPSS
0.5%
top 33.12%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
9
Mistune Project MistuneDebian MistuneFedoraproject Fedora+6 more
Timeline
PublishedJul 25
Latest updateJul 26

Description

In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages10 packages

▶debiandebian/mistune< mistune 2.0.3-1 (bookworm)
▶PyPImistune_project/mistune2.0.0a1 — 2.0.3
▶Debianmistune_project/mistune< 2.0.3-1+2

Also affects: Fedora 37

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
Mistune vulnerable to catastrophic backtracking↗2022-07-26
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OSV
Mistune vulnerable to catastrophic backtracking↗2022-07-26
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OSV
CVE-2022-34749: In mistune through 2↗2022-07-25
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📋Vendor Advisories

3
Red Hat
mistune: catastrophic backtracking↗2022-07-26
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Microsoft
In mistune through 2.0.2 support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named cata↗2022-07-12
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Debian
CVE-2022-34749: mistune - In mistune through 2.0.2, support of inline markup is implemented by using regul...↗2022
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