PT-2021-19426 · Unknown+2 · Oauth Extension+2

Reedy · Published 2021-04-22 · Updated 2024-03-06 · CVE-2021-31555

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:H/A:N

Name of the Vulnerable Software and Affected Versions MediaWiki versions through 1.35.2

Description An issue was discovered in the Oauth extension for MediaWiki. It did not validate the oarc version (also known as oauth registered consumer.oarc version) parameter's length.

Recommendations For MediaWiki versions through 1.35.2, as a temporary workaround, consider restricting access to the Oauth extension until a patch is available. Avoid using the oarc version parameter in affected API endpoints until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2021-1991

ALT-PU-2021-2091

BIT-MEDIAWIKI-2021-31555

CVE-2021-31555

Affected Products

Alt Linux

Mediawiki

Oauth Extension

References · 6

• https://osv.dev/vulnerability/BIT-mediawiki-2021-31555 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-31555 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31555 · Security Note
• https://gerrit.wikimedia.org/r/q/I222c053b4b14ac1ad0f5b3a51565b1b9cd4c139d · Vendor Advisory
• https://phabricator.wikimedia.org/T277388 · Note
• https://t.me/cvenotify/13537 · Telegram Post