PT-2021-22913 · Weechat+3 · Weechat+3

Stuart Nevans Locke · Published 2021-09-05 · Updated 2022-03-27 · CVE-2021-40516

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions WeeChat versions prior to 3.2.1

Description The issue allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that triggers an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.

Recommendations For versions prior to 3.2.1, update to version 3.2.1 or later to resolve the issue. As a temporary workaround, consider disabling the Relay plugin until a patch is available. Restrict access to the relay-websocket.c module to minimize the risk of exploitation.

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2022-1588

CVE-2021-40516

DLA-2770-1

MGASA-2021-0466

OPENSUSE-SU-2022:0083-1

USN-5258-1

Affected Products

Alt Linux

Linuxmint

Ubuntu

Weechat

References · 28

• https://github.com/weechat/weechat/commit/8b1331f98de1714bae15a9ca2e2b393ba49d735b · Patch
• https://weechat.org/doc/security · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-9760 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-40516 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-40516 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0466.html · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-40516 · Security Note
• https://ubuntu.com/security/CVE-2017-14727 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2022:0083-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-8955 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-40516 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-40516 · Security Note
• https://osv.dev/vulnerability/DLA-2770-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2021-0466 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-40516 · Vendor Advisory