Vulnerability DatabaseCVE-2022-34749
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CVE-2022-34749
July 25, 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.
Affected Packages
mistune (PYTHON):
Affected version(s) >=2.0.0a1 <2.0.3
Fix Suggestion:
Update to version 2.0.3
Related Resources (10)
https://github.com/lepture/mistune
https://github.com/lepture/mistune/commit/ca1e7b506850f4e488823fc7338b49a8f9852718
https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2022-237.yaml
https://nvd.nist.gov/vuln/detail/CVE-2022-34749
https://github.com/lepture/mistune/issues/314#issuecomment-1223972386
https://github.com/lepture/mistune/releases
https://github.com/advisories/GHSA-fw3v-x4f2-v673
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63
https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Regular Expression Complexity
CWE-1333
EPSS
Base Score:
0.52