Bug 811603 (CVE-2021-40516)

Summary:	<net-irc/weechat-3.3: Websocket vulnerability in relay plugin
Product:	Gentoo Security	Reporter:	Sam James <sam>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	IN_PROGRESS ---
Severity:	minor	CC:	flow, gyakovlev
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:	B3 [glsa?]
Package list:		Runtime testing required:	---
Bug Depends on:	816240, 816696
Bug Blocks:

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!