GLSA 201811-03: OpenSSL: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	OpenSSL: Denial of Service
Date:	11/09/2018
Bugs:	#663654
ID:	201811-03

Synopsis

A vulnerability in OpenSSL might allow remote attackers to cause a Denial of Service condition.

Background

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general purpose cryptography library.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/openssl	< 1.0.2o-r6	>= 1.0.2o-r6	All supported architectures

Description

It was discovered that OpenSSL allow malicious servers to send very large primes to a client during DH(E) based TLS handshakes.

Impact

A remote attacker, by sending large prime to client during DH(E) TLS handshake, could possibly cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All OpenSSL users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.2o-r6"

References

CVE-2018-0732

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201811-03.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.