What’s Vulnerable › Vulnerabilities

CVE-2020-8955

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-12 · updated 2026-06-17
• Weakness: CWE-120

Description

irc_mode_channel_update in plugins/irc/irc-mode.c in WeeChat through 2.7 allows remote attackers to cause a denial of service (buffer overflow and application crash) or possibly have unspecified other impact via a malformed IRC message 324 (channel mode).

Affected products

• Debian Linux: 8.0, 9.0
• Fedoraproject Fedora: 30, 31, 32
• openSUSE Backports Sle: 15.0, 15.0-sp1
• openSUSE Leap: 15.1
• weechat: from 0.3.8 through 2.7

References

• http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00032.html
• https://github.com/weechat/weechat/commit/6f4f147d8e86adf9ad34a8ffd7e7f1f23a7e74da
• https://lists.debian.org/debian-lts-announce/2020/03/msg00031.html
• https://lists.debian.org/debian-lts-announce/2021/09/msg00018.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ASRTCQFFDAAK347URWNDH6NSED2BGNY/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ER23GT23US5JXDLUZAMGMWXKZ74MI4S2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M3LAJTLI3LWZRNCFYJ7PCBBTHUMCCBHH/
• https://security.gentoo.org/glsa/202003-51
• https://weechat.org/doc/security/
• http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00032.html
• https://github.com/weechat/weechat/commit/6f4f147d8e86adf9ad34a8ffd7e7f1f23a7e74da
• https://lists.debian.org/debian-lts-announce/2020/03/msg00031.html

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