Vulnerability identifier: #VU62818

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-29166

CWE-ID: CWE-93

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
matrix-appservice-irc
Other software / Other software solutions

Vendor: matrix.org

Description

The vulnerability allows a remote attacker to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

matrix-appservice-irc: 0.1.1 - 0.33.1

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External links
http://github.com/matrix-org/matrix-appservice-irc/releases/tag/0.34.0
http://matrix.org/blog/2022/05/04/0-34-0-security-release-for-matrix-appservice-irc-high-severity

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.