[arch-security] [ASA-201709-20] weechat: denial of service

[Christian Rebischke]

Arch Linux Security Advisory ASA-201709-20
==========================================

Severity: Medium
Date    : 2017-09-25
CVE-ID  : CVE-2017-14727
Package : weechat
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-412

Summary
=======

The package weechat before version 1.9.1-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 1.9.1-1.

# pacman -Syu "weechat>=1.9.1-1"

The problem has been fixed upstream in version 1.9.1.

Workaround
==========

Unload the logger plugin: /plugin unload logger

Description
===========

It has been discovered that in logger.c in the logger plugin before
weechat 1.9.1 the date/time conversion specifiers are expanded after
replacing buffer local variables in name of log files. In some cases,
this can lead to an error in function strftime and a crash caused by
the use of an uninitialized buffer.

Impact
======

A remote attacker can crash the client via a specially crafted string.

References
==========

https://weechat.org/download/security/
https://github.com/weechat/weechat/commit/e4cc90f4b43153dc1c6516c1f1aad2504faa5443
https://security.archlinux.org/CVE-2017-14727
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