CVE-2023-38700

low-risk
Published 2023-08-04

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.

Do I need to act?

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0.27% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.5/10 Low
NETWORK / HIGH complexity

Affected Products (1)

Matrix Irc Bridge

Affected Vendors

Matrix

References (6)

Patch https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9...
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-c7h...
Patch https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9...
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-c7h...
18
/ 100
low-risk
Severity 12/34 · Low
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal