Low severity · published Aug 4, 2023
CVE-2023-38700
matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms
3.7
CVSS
0.6%
EPSS
No
On KEV
Description
matrix-appservice-irc is a Node.js IRC bridge for Matrix. Prior to version 1.0.1, it was possible to craft an event such that it would leak part of a targeted message event from another bridged room. This required knowing an event ID to target. Version 1.0.1n fixes this issue. As a workaround, set the `matrixHandler.eventCacheSize` config value to `0`. This workaround may impact performance.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
matrix-appservice-irc · matrix-org
< 1.0.1 · source: vendor
MI
Matrix Irc Bridge · Matrix
before 1.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-38700
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-38700
Patch
https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75
Release Notes
https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1
Vendor Advisory
https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4q
More from matrix-appservice-irc
9.8
CVE-2023-38690
matrix-appservice-irc IRC command injection via admin commands containing newlines
8.8
CVE-2022-39203
Parsing issue in matrix-org/node-irc leading to room takeovers
8.8
CVE-2022-29166
Improper handling of multiline messages in matrix-appservice-irc
6.3
CVE-2022-39202
IRC mode parameter confusion in matrix-appservice-irc
5.4
CVE-2024-52505
matrix-appservice-irc allows IRC Command injection in provisioning API