Vulnerability identifier: #VU633

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-7045

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 unformat_24bit_color() 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
http://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.