ASA-202101-22 log generated external raw

Arch Linux Security Advisory ASA-202101-22 ========================================== Severity: Medium Date : 2021-01-12 CVE-ID : CVE-2020-35474 CVE-2020-35475 CVE-2020-35477 CVE-2020-35478 CVE-2020-35479 CVE-2020-35480 Package : mediawiki Type : multiple issues Remote : Yes Link : https://security.archlinux.org/AVG-1371 Summary ======= The package mediawiki before version 1.35.1-1 is vulnerable to multiple issues including cross-site scripting and information disclosure. Resolution ========== Upgrade to 1.35.1-1. # pacman -Syu "mediawiki>=1.35.1-1" The problems have been fixed upstream in version 1.35.1. Workaround ========== None. Description =========== - CVE-2020-35474 (cross-site scripting) In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML. - CVE-2020-35475 (cross-site scripting) In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.) - CVE-2020-35477 (information disclosure) MediaWiki before 1.35.1 blocks legitimate attempts to hide log entries in some situations. If one sets MediaWiki:Mainpage to Special:MyLanguage/Main Page, visits a log entry on Special:Log, and toggles the "Change visibility of selected log entries" checkbox (or a tags checkbox) next to it, there is a redirection to the main page's action=historysubmit (instead of the desired behavior in which a revision-deletion form appears). - CVE-2020-35478 (cross-site scripting) MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. MediaWiki:blanknamespace potentially can be output as raw HTML with SCRIPT tags via LogFormatter::makePageLink(). This affects MediaWiki 1.33.0 and later. - CVE-2020-35479 (cross-site scripting) MediaWiki before 1.35.1 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. This affects MediaWiki 1.12.0 and later. - CVE-2020-35480 (information disclosure) 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. Impact ====== A malicious remote user might execute code in the browser or disclose sensitive information. References ========== https://bugs.archlinux.org/task/69132 https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html https://phabricator.wikimedia.org/T268894 https://github.com/wikimedia/mediawiki/commit/a8b1d863bccc6b326329d0593f8126c351c6e1be https://phabricator.wikimedia.org/T268917 https://github.com/wikimedia/mediawiki/commit/1f9756a4905cf61dbb3a3d742a0e2296d555c6fe https://phabricator.wikimedia.org/T205908 https://github.com/wikimedia/mediawiki/commit/ac7aa53532bab782c7453e302d20e8a0712c8395 https://phabricator.wikimedia.org/T268938 https://github.com/wikimedia/mediawiki/commit/3437133440b6d535c25e4ae28020c809a30849b5 https://github.com/wikimedia/mediawiki/commit/78663c50df6b953f4c832e1530515ebe91e1eb5d https://phabricator.wikimedia.org/T120883 https://github.com/wikimedia/mediawiki/commit/15bed1201ea21ce477a16e9d02170244b0086fb4 https://github.com/wikimedia/mediawiki/commit/aca0e52f5ce9312a4af4f411c756497902483a48 https://security.archlinux.org/CVE-2020-35474 https://security.archlinux.org/CVE-2020-35475 https://security.archlinux.org/CVE-2020-35477 https://security.archlinux.org/CVE-2020-35478 https://security.archlinux.org/CVE-2020-35479 https://security.archlinux.org/CVE-2020-35480