SB2016121386 - Gentoo update for Botan

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2016-2194)

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

The ressol function in Botan before 1.10.11 and 1.11.x before 1.11.27 allows remote attackers to cause a denial of service (infinite loop) via unspecified input to the OS2ECP function, related to a composite modulus.

2) Heap-based buffer overflow (CVE-ID: CVE-2016-2195)

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 the PointGFp constructor in Botan before 1.10.11 and 1.11.x before 1.11.27. A remote attacker can use a crafted ECC point 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/201612-38