Information disclosure in MediaWiki

1) Information disclosure

EUVDB-ID: #VU29289

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15005

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to private wikis behind a caching server using the img_auth.php image authorization security feature may have had their files cached publicly. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MediaWiki: 1.31.0 - 1.34.1

CPE2.3

• cpe:2.3:a:mediawiki_org:mediawiki:1.31.0:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.1:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.2:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.3:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.4:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.5:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.6:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.31.7:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.33.0:*:*:*:*:*:*:*
• cpe:2.3:a:mediawiki_org:mediawiki:1.33.1:*:*:*:*:*:*:*

External links

https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_31/RELEASE-NOTES-1.31
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_33/RELEASE-NOTES-1.33
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/REL1_34/RELEASE-NOTES-1.34
https://phabricator.wikimedia.org/T248947

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.