Vulnerability identifier: #VU26384
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-119
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
WeeChat
Client/Desktop applications /
Messaging software
Vendor: WeeChat.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when a new IRC message 005 is received with longer nick prefixes. A remote attacker can send a specially crafted message 005, trigger memory corruption and cause a denial of service condition on the target system when a new mode is set for a nick.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
WeeChat: 0.3.4 - 2.7
External links
http://github.com/weechat/weechat/commit/40ccacb4330a64802b1f1e28ed9a6b6d3ca9197f
http://lists.debian.org/debian-lts-announce/2020/03/msg00031.html
http://weechat.org/doc/security/
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.