Description (CNA)
YesWiki before 4.6.7 contains an algorithmic-complexity denial of service in the wakka.php formatter due to an O(n^2) markdown-link regex. Unauthenticated attackers can submit a small crafted body of bracket characters to the page-edit preview endpoint to pin PHP-FPM workers and saturate the pool.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| YesWiki / yeswiki | affected 0 before 4.6.7; unaffected 4.6.7 |
CWE
CWE-1333
References
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-gf57-wg5m-h34q
- https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-redos-via-wakka-php-edit-preview-endpoint
ADP enrichment
No English description supplied.