#VU632 Arbitrary code execution in Irssi - CVE-2016-7044

Vulnerability identifier: #VU632

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-7044

CWE-ID: CWE-126

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Irssi
Client/Desktop applications / Messaging software

Vendor: Irssi.org

Description
The vulnerability allows a remote user to cause arbitrary code execution on the target system.
The weakness exists due to input validation error. Having tricked the victim into loading specially crafted file attackers can invoke a buffer overflow in format_send_to_gui() and execute arbitrary code.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation
Update to 0.8.20.

Vulnerable software versions

Irssi: 0.8.17 beta - 0.8.19

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External links
https://irssi.org/security/irssi_sa_2016.txt

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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.