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CVE-2022-34749

Good to know:

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Date: July 24, 2022

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.

Language: Python

Severity Score

Related Resources (11)

https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2022-237.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/
https://github.com/lepture/mistune/releases
https://nvd.nist.gov/vuln/detail/CVE-2022-34749
https://github.com/lepture/mistune/commit/ca1e7b506850f4e488823fc7338b49a8f9852718
https://github.com/lepture/mistune/issues/314#issuecomment-1223972386
https://github.com/lepture/mistune
https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63
https://github.com/advisories/GHSA-fw3v-x4f2-v673
https://www.mend.io/vulnerability-database/CVE-2022-34749

Severity Score

Weakness Type (CWE)

Incorrect Comparison

CWE-697

Inefficient Regular Expression Complexity

CWE-1333

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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