811603 – (CVE-2021-40516) <net-irc/weechat-3.3: Websocket vulnerability in relay plugin

Bug 811603 (CVE-2021-40516) - <net-irc/weechat-3.3: Websocket vulnerability in relay plugin

Summary: <net-irc/weechat-3.3: Websocket vulnerability in relay plugin

Status:	IN_PROGRESS

Alias:	CVE-2021-40516

Product:	Gentoo Security
Classification:	Unclassified
Component:	Vulnerabilities (show other bugs)
Hardware:	All Linux

Importance:	Normal minor (vote)
Assignee:	Gentoo Security

URL:
Whiteboard:	B3 [glsa?]
Keywords:

Depends on:	816240 816696
Blocks:
	Show dependency tree

Reported:	2021-09-04 20:56 UTC by Sam James
Modified:	2021-10-12 16:49 UTC (History)
CC List:	2 users (show)

See Also:
Package list:
Runtime testing required:	---

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Description Sam James archtester

2021-09-04 20:56:19 UTC

From email to weechat-security@nongnu.org:
```
Hi all,

A security vulnerability has been fixed in WeeChat 3.2.1, which was released a
few hours ago: a malformed websocket frame sent to the relay plugin can cause a
buffer overflow and possibly a crash.

This happens only if you define a relay (irc or weechat), even if a password is
defined (the crash happens before the authentication of the client).

This vulnerability affects WeeChat versions from 0.4.1 to 3.2.

Some workarounds, if you can not upgrade:

- remove all relays
- unload the relay plugin
- secure relay to allow only some trusted IP addresses
 (option relay.network.allowed_ips).

Thanks to Stuart Nevans Locke for reporting the problem.

For more info, please visit the WeeChat security page:
https://weechat.org/doc/security/

-- 
Sébastien Helleu
```

Comment 1 Sam James archtester

2021-09-21 00:11:00 UTC

ping

Comment 2 Georgy Yakovlev archtester

2021-10-12 16:29:31 UTC

bumpage, stabilization and cleanup done. please proceed with security things =)

Comment 3 John Helmert III archtester

2021-10-12 16:49:18 UTC

Thanks!