PT-2022-24804 · Unknown · Matrix-Appservice-Irc

Published 2022-09-13 · Updated 2022-09-16 · CVE-2022-39203

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions matrix-appservice-irc versions prior to 0.35.0

Description The issue allows attackers to specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel and an existing channel, allowing them to grant themselves permissions in the channel.

Recommendations For versions prior to 0.35.0, update to version 0.35.0 to resolve the issue. As a temporary workaround, operators may disable dynamic channel joining via dynamicChannels.enabled to prevent users from joining new channels.

Exploit

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2022-39203

GHSA-XVQG-MV25-RWVW

Affected Products

Matrix-Appservice-Irc

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39203.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-39203 · Security Note
• https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-xvqg-mv25-rwvw · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-39203 · Vendor Advisory
• https://github.com/matrix-org/matrix-appservice-irc · Note
• https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw · Note
• https://t.me/cibsecurity/49713 · Telegram Post