SB2017010209 - Gentoo update for libotr, Pidgin OTR

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2015-8833)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing vectors related to the "Authenticate buddy" menu item. <a href="http://cwe.mitre.org/data/definitions/416. A remote attackers can execute arbitrary code.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

2) Heap-based buffer overflow (CVE-ID: CVE-2016-2851)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Integer overflow in proto.c in libotr before 4.1.1 on 64-bit platforms. A remote attacker can use a series of large OTR messages to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/
• https://security.gentoo.org/glsa/201701-10