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Improper handling of multiline messages in node-irc affects matrix-appservice-irc

High severity GitHub Reviewed Published May 4, 2022 in matrix-org/matrix-appservice-irc • Updated Jan 27, 2023

Package

npm matrix-appservice-irc (npm)

Affected versions

<= 0.33.1

Patched versions

0.33.2

Description

matrix-appservice-irc provides an IRC bridge for Matrix. The vulnerability in node-irc allows an attacker to manipulate a Matrix user into executing IRC commands by having them reply to a maliciously crafted message. The vulnerability has been patched in matrix-appservice-irc 0.33.2. In terms of a workaround, users should refrain from replying to messages from untrusted participants in IRC-bridged Matrix rooms.

References

@dkasak dkasak published to matrix-org/matrix-appservice-irc May 4, 2022
Published by the National Vulnerability Database May 5, 2022
Published to the GitHub Advisory Database May 23, 2022
Reviewed May 23, 2022
Last updated Jan 27, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS score

0.221%
(61st percentile)

Weaknesses

CVE ID

CVE-2022-29166

GHSA ID

GHSA-37hr-348p-rmf4

Source code

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