CentOS Update for nss-util CESA-2015:1185 centos7

Published: 2015-06-26 04:24:35
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:M/Au:N/C:N/I:P/A:N

Detection Type:
Linux Distribution Package

Summary:
Check the version of nss-util

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
Network Security Services (NSS) is a set of libraries designed to support cross-platform development of security-enabled client and server applications. A flaw was found in the way the TLS protocol composes the Diffie-Hellman (DH) key exchange. A man-in-the-middle attacker could use this flaw to force the use of weak 512 bit export-grade keys during the key exchange, allowing them do decrypt all traffic. (CVE-2015-4000) Note: This update forces the TLS/SSL client implementation in NSS to reject DH key sizes below 768 bits, which prevents sessions to be downgraded to export-grade keys. Future updates may raise this limit to 1024 bits. The nss and nss-util Linux Distribution Packages have been upgraded to upstream versions 3.19.1. The upgraded versions provide a number of bug fixes and enhancements over the previous versions. Users of nss and nss-util are advised to upgrade to these updated Linux Distribution Packages, which fix these security flaws, bugs, and add these enhancements.

Affected Versions:
nss-util on CentOS 7

Recommendations:
Please install the updated Linux Distribution Packages.

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-4000

References:

http://lists.centos.org/pipermail/centos-announce/2015-June/021223.html

Severity
Medium
CVSS Score
4.3
Published
2015-06-26
Modified
2019-03-08
Category
CentOS Local Security Checks

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