An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x before 1.39.3. An auto-block can occur for an untrusted X-Forwarded-For header.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x     before 1.39.3. An auto-block can occur for an untrusted X-Forwarded-For header. (CVE-2023-29141)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3540 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3540-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Markus Koschany     August 23, 2023                               https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : mediawiki     Version        : 1:1.31.16-1+deb10u6     CVE ID         : CVE-2023-29141

    An auto-block can occur for an untrusted X-Forwarded-For header in     MediaWiki, a website engine for collaborative work.

    X-Forwarded-For is not necessarily trustworthy and can specify multiple IP     addresses in a single header, all of which are checked for blocks. When a user     is autoblocked, the wiki will create an IP block behind-the-scenes for that     user without exposing the user's IP on-wiki. However, spoofing XFF would let an     attacker guess at the IPs of users who have active autoblocks, since the     block message includes the username of the original block target.

    For Debian 10 buster, this problem has been fixed in version     1:1.31.16-1+deb10u6.

    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     Attachment:
    signature.asc     Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5447 advisory.

    Multiple security issues were discovered in MediaWiki, a website engine for collaborative work, which     could result in cross-site scripting, a bypass of vandalism protections or information disclosure. For the     oldstable distribution (bullseye), these problems have been fixed in version 1:1.35.11-1~deb11u1. For the     stable distribution (bookworm), these problems have been fixed in version 1:1.39.4-1~deb12u1. 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

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 38 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2023-9d6ab5ebf2 advisory.

    https://lists.wikimedia.org/hyperkitty/list/mediawiki-     announce@lists.wikimedia.org/message/6UQBHI5FWLATD7QO7DI4YS54U7XSSLAN/

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 37 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2023-567baef490 advisory.

    https://lists.wikimedia.org/hyperkitty/list/mediawiki-     announce@lists.wikimedia.org/message/6UQBHI5FWLATD7QO7DI4YS54U7XSSLAN/

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
248223	Linux Distros Unpatched Vulnerability : CVE-2023-29141	Nessus	Misc.	critical
180100	Debian dla-3540 : mediawiki - security update	Nessus	Debian Local Security Checks	critical
178014	Debian DSA-5447-1 : mediawiki - security update	Nessus	Debian Local Security Checks	critical
174365	Fedora 38 : mediawiki (2023-9d6ab5ebf2)	Nessus	Fedora Local Security Checks	critical
174034	Fedora 37 : mediawiki (2023-567baef490)	Nessus	Fedora Local Security Checks	critical

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CVE-2023-29141

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