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Debian LTS Advisory DLA-2504-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Roberto C. Sánchez
December 22, 2020 https://wiki.debian.org/LTS
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Package : mediawiki
Version : 1:1.27.7-1~deb9u7
CVE ID : CVE-2020-15005 CVE-2020-35477 CVE-2020-35479 CVE-2020-35480
Multiple security issues were discovered in MediaWiki, a website engine
for collaborative work.
CVE-2020-15005
Private wikis behind a caching server using the img_auth.php image
authorization security feature may have had their files cached
publicly, so any unauthorized user could view them.
CVE-2020-35477
Blocks legitimate attempts to hide log entries in some situations.
CVE-2020-35479
Allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry
itself does not escape in all code paths. For example, the return of
Language::userTimeAndDate is is always unsafe for HTML in a month
value.
CVE-2020-35480
Missing users (accounts that don't exist) and hidden users (accounts
that have been explicitly hidden due to being abusive, or similar)
that the viewer cannot see are handled differently, exposing
sensitive information about the hidden status to unprivileged
viewers.
For Debian 9 stretch, these problems have been fixed in version
1:1.27.7-1~deb9u7.
We recommend that you upgrade your mediawiki packages.
For the detailed security status of mediawiki please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/mediawiki
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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