SB2017011938 - Gentoo update for irssi

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2017-5193)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via a message without a nick.

2) Use-after-free (CVE-ID: CVE-2017-5194)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing an invalid nick message. A remote attackers can cause a denial of service (crash).

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

3) Out-of-bounds read (CVE-ID: CVE-2017-5195)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Irssi 0.8.17 before 0.8.21 allows remote attackers to cause a denial of service (out-of-bounds read and crash) via a crafted ANSI x8 color code.

4) Out-of-bounds read (CVE-ID: CVE-2017-5196)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Irssi 0.8.18 before 0.8.21 allows remote attackers to cause a denial of service (out-of-bounds read and crash) via vectors involving strings that are not UTF8.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/
• https://security.gentoo.org/glsa/201701-45