#VU10606 NULL pointer dereference in Irssi - CVE-2018-7050

Vulnerability identifier: #VU10606

Vulnerability risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-7050

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Irssi
Client/Desktop applications / Messaging software

Vendor: Irssi.org

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to a NULL pointer dereference when an "empty" nick has been observed. A remote attacker can use a broken ircd or control over the ircde and cause the service to crash.

Mitigation
Update to version 1.0.7, 1.1.1.

Vulnerable software versions

Irssi: 1.0.0 - 1.1.0

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External links
https://irssi.org/security/irssi_sa_2018_02.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.