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Vulnerability DatabaseCVE-2020-8955

CVE-2020-8955: 
NixOS vulnerability analysis and mitigation

Overview

CVE-2020-8955 affects WeeChat through version 2.7, specifically in the irc_mode_channel_update function within plugins/irc/irc-mode.c. The vulnerability was discovered and reported by Stuart Nevans Locke, with public disclosure on February 12, 2020 (NVD, WeeChat Security).

Technical details

The vulnerability is a buffer overflow vulnerability that occurs when processing malformed IRC message 324 (channel mode). It has been assigned a CVSS v3.1 base score of 9.8 (Critical) with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The issue is classified as CWE-120: Buffer Copy without Checking Size of Input (NVD).

Impact

The vulnerability allows remote attackers to cause a denial of service (buffer overflow and application crash) or potentially have unspecified other impacts via a malformed IRC message 324 (channel mode) (NVD, Gentoo Security).

Mitigation and workarounds

The vulnerability was fixed in WeeChat version 2.7.1. There are no known workarounds, and users are strongly recommended to upgrade to the latest version. The fix was implemented through a patch that addresses the buffer overflow issue (WeeChat Security, Gentoo Security).

Additional resources

Source: This report was generated using AI

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