4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
6.6 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
15.7%
The matrix-appservice-irc before version 2.0.0 can be exploited to leak the truncated body of a message if a malicious user sends a Matrix reply to an event ID they don’t have access to. As a precondition to the attack, the malicious user needs to know the event ID of the message they want to leak, as well as to be joined to both the Matrix room and the IRC channel it is bridged to.
The message reply containing the leaked message content is visible to IRC channel members when this happens.
matrix-appservice-irc 2.0.0 checks whether the user has permission to view an event before constructing a reply. Administrators should upgrade to this version.
It’s possible to limit the amount of information leaked by setting a reply template that doesn’t contain the original message. See these lines in the configuration file.
https://github.com/matrix-org/matrix-appservice-irc/pull/1799
If you have any questions or comments about this advisory, please email us at security at matrix.org.
CPE | Name | Operator | Version |
---|---|---|---|
matrix-appservice-irc | lt | 2.0.0 |
github.com/advisories/GHSA-wm4w-7h2q-3pf7
github.com/matrix-org/matrix-appservice-irc/blob/d5d67d1d3ea3f0f6962a0af2cc57b56af3ad2129/config.sample.yaml#L601-L604
github.com/matrix-org/matrix-appservice-irc/commit/4af7d3009f10b1f2fb810784c1e491d9d3bee82b
github.com/matrix-org/matrix-appservice-irc/pull/1799
github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-wm4w-7h2q-3pf7
nvd.nist.gov/vuln/detail/CVE-2024-32000
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
6.6 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
15.7%