CVE-2015-2942 Denial of service in n/a
Remote attackers can cause denial of service via billion laughs attacks in SVG or PDF files when MediaWiki uses HHVM.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-2942?
CVE-2015-2942 is a high-severity denial of service vulnerability in Mediawiki Mediawiki, published on 13 Apr 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-399
Which versions are affected by CVE-2015-2942?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2015-2942?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2015-2942 being exploited?
There is no known exploitation of CVE-2015-2942 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as DEBIAN-CVE-2015-2942, GHSA-mmcv-w5m4-3p9m.