Process hang via SVN output regex backtracking
Published Oct 16, 2022 · Updated May 14, 2025
The disputed claim for py 1.11.0 and earlier says crafted SVN data lets remote attackers hang a process through regular-expression backtracking. InfoSvnCommand.lspattern matches attacker-controlled svn ls -v output with overlapping variable-length groups that were alleged to cause excessive backtracking. This path requires a caller to process listing data from an attacker-controlled Subversion repository, and GitHub withdrew the advisory after reviewers could not reproduce the claimed slowdown.
Summary
What happened
The disputed claim for py 1.11.0 and earlier says crafted SVN data lets remote attackers hang a process through regular-expression backtracking. InfoSvnCommand.lspattern matches attacker-controlled svn ls -v output with overlapping variable-length groups that were alleged to cause excessive backtracking. This path requires a caller to process listing data from an attacker-controlled Subversion repository, and GitHub withdrew the advisory after reviewers could not reproduce the claimed slowdown.
The record
- CVE
- CVE-2022-42969
- Published
- Oct 16, 2022
- Updated
- May 14, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-1333, CAPEC-492, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 16, 2022CVE publishedPublication date reported by the CVE source.
- May 14, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- InfoSvnCommand ReDoS proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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