Information Exposure Affecting mediawiki package, versions <1:1.27.7-1~deb9u7
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Test your applications- Snyk ID SNYK-DEBIAN9-MEDIAWIKI-1052815
- published 18 Dec 2020
- disclosed 18 Dec 2020
Introduced: 18 Dec 2020
CVE-2020-35480 Open this link in a new tabHow to fix?
Upgrade Debian:9
mediawiki
to version 1:1.27.7-1~deb9u7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mediawiki
package and not the mediawiki
package as distributed by Debian
.
See How to fix?
for Debian:9
relevant fixed versions and status.
An issue was discovered in MediaWiki before 1.35.1. 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. This exists on various code paths.
References
- https://security-tracker.debian.org/tracker/CVE-2020-35480
- https://www.debian.org/security/2020/dsa-4816
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
- https://phabricator.wikimedia.org/T120883
- https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/