#VU16953 Use-after-free in Irssi - CVE-2019-5882

Vulnerability identifier: #VU16953

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-5882

CWE-ID: CWE-416

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 conduct DoS attack.

The vulnerability exists due to a use-after-free error when hidden lines are expired from the scroll buffer. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation
Update to version 1.1.2.

Vulnerable software versions

Irssi: 1.1.0 - 1.1.1

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External links
https://github.com/irssi/irssi/pull/948
https://irssi.org/NEWS/#v1-1-2
https://irssi.org/security/irssi_sa_2019_01.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.