Description
MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM, allows remote attackers to cause a denial of service (CPU and memory consumption) via a large number of nested entity references in an (1) SVG file or (2) XMP metadata in a PDF file, aka a "billion laughs attack," a different vulnerability than CVE-2015-2937.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mediawiki | 1:1.19.20+dfsg-2.3 | — |
| Debian 13 | mediawiki | 1:1.19.20+dfsg-2.3 | — |
| Debian 12 | mediawiki | 1:1.19.20+dfsg-2.3 | — |
References
- GLSA-201510-05 vendor-advisory
- 73477 vdb-entry
- [oss-security] 20150407 Re: CVE request: MediaWiki 1.24.2/1.23.9/1.19.24 mailing-list
- [oss-security] 20150331 CVE request: MediaWiki 1.24.2/1.23.9/1.19.24 mailing-list
- [MediaWiki-announce] 20150331 MediaWiki Security and Maintenance Releases: 1.19.24, 1.23.9, and 1.24.2 mailing-list
- https://phabricator.wikimedia.org/T85848