PT-2022-22316 · Mediawiki+1 · Mediawiki+1

Lucas Werkmeister + 1 · Published 2022-06-28 · Updated 2024-08-20 · CVE-2022-34750

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions MediaWiki versions through 1.38.1

Description An issue in MediaWiki allows the creation of larger lexemes than the capped length of a thousand characters, as this length is not validated. This introduces denial-of-service attack vectors within the Wikibase and WikibaseLexeme extensions, related to "Special:NewLexeme" and "Special:NewProperty".

Recommendations For versions through 1.38.1, consider restricting the creation of new lexemes or validating the lemma length to prevent denial-of-service attacks. As a temporary workaround, restrict access to "Special:NewLexeme" and "Special:NewProperty" to minimize the risk of exploitation.

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

ALT-PU-2022-3361

ALT-PU-2024-11168

ALT-PU-2024-1228

BIT-MEDIAWIKI-2022-34750

CVE-2022-34750

Affected Products

Alt Linux

Mediawiki

References · 7

• https://gerrit.wikimedia.org/r/q/I8171bfef73e525d73efa60b407ce147130ea4742 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-34750 · Security Note
• https://gerrit.wikimedia.org/r/q/Id89a9b08e40f075d2d422cafd03668dff3ce7fc9 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-mediawiki-2022-34750 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-34750 · Vendor Advisory
• https://t.me/cibsecurity/45293 · Telegram Post
• https://phabricator.wikimedia.org/T308659 · Note