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Gentoo: GLSA-201811-03 Normal: OpenSSL Denial of Service Threat

gentoo
Calendar Grey November 9, 2018
Dist Gentoo Esm H88
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A vulnerability in OpenSSL might allow remote attackers to cause a Denial of Service condition.

Summary

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

Topics%20covered

Topics Covered

security advisory denial of service gentoo remote attack openssl normal severity

Resolution

All OpenSSL users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.2o-r6"

References

[ 1 ] CVE-2018-0732 https://nvd.nist.gov/vuln/detail/CVE-2018-0732

Availability

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

Severity: Normal
Title: OpenSSL: Denial of Service
Date: November 09, 2018
Bugs: #663654
ID: 201811-03

Topics%20covered

Topics Covered

security advisory denial of service gentoo remote attack openssl normal severity

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 1.0.2o-r6 >= 1.0.2o-r6

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.

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