[ASA-201802-8] irssi: multiple issues

[Santiago Torres-Arias]

Arch Linux Security Advisory ASA-201802-8
=========================================

Severity: High
Date    : 2018-02-15
CVE-ID  : CVE-2018-7050 CVE-2018-7051 CVE-2018-7052 CVE-2018-7053
          CVE-2018-7054
Package : irssi
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-616

Summary
=======

The package irssi before version 1.1.1-1 is vulnerable to multiple
issues including arbitrary code execution, information disclosure and
denial of service.

Resolution
==========

Upgrade to 1.1.1-1.

# pacman -Syu "irssi>=1.1.1-1"

The problems have been fixed upstream in version 1.1.1.

Workaround
==========

None.

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

- CVE-2018-7050 (arbitrary code execution)

An issue was discovered in Irssi before 1.1.1. A NULL pointer
dereference occurs for an "empty" nick.

- CVE-2018-7051 (information disclosure)

An issue was discovered in Irssi before 1.1.1. Certain nick names could
result in out-of-bounds access when printing theme strings.

- CVE-2018-7052 (denial of service)

An issue was discovered in Irssi before 1.1.1. When the number of
windows exceeds the available space, a crash due to a NULL pointer
dereference would occur.

- CVE-2018-7053 (arbitrary code execution)

An issue was discovered in Irssi before 1.1.1. There is a use-after-
free when SASL messages are received in an unexpected order.

- CVE-2018-7054 (arbitrary code execution)

An issue was discovered in Irssi before 1.1.1. There is a use-after-
free when a server is disconnected during netsplits.

Impact
======

A remote attacker is able to crash the application, execute arbitrary
code or read memory via a malicious server or by tricking a user to use
malicious commands.

References
==========

https://irssi.org/security/irssi_sa_2018_02.txt
https://security.archlinux.org/CVE-2018-7050
https://security.archlinux.org/CVE-2018-7051
https://security.archlinux.org/CVE-2018-7052
https://security.archlinux.org/CVE-2018-7053
https://security.archlinux.org/CVE-2018-7054
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