Rapid7 Vulnerability & Exploit Database

RHSA-2015:1185: nss security update

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RHSA-2015:1185: nss security update

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
05/20/2015
Created
07/25/2018
Added
06/25/2015
Modified
03/21/2018

Description

Network Security Services (NSS) is a set of libraries designed to support cross-platform development of security-enabled client and serverapplications.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 toforce 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 toreject DH key sizes below 768 bits, which prevents sessions to bedowngraded to export-grade keys. Future updates may raise this limit to1024 bits.The nss and nss-util packages have been upgraded to upstream versions3.19.1. The upgraded versions provide a number of bug fixes andenhancements over the previous versions.Users of nss and nss-util are advised to upgrade to these updated packages,which fix these security flaws, bugs, and add these enhancements.

Solution(s)

  • redhat-upgrade-nss
  • redhat-upgrade-nss-debuginfo
  • redhat-upgrade-nss-devel
  • redhat-upgrade-nss-pkcs11-devel
  • redhat-upgrade-nss-sysinit
  • redhat-upgrade-nss-tools
  • redhat-upgrade-nss-util
  • redhat-upgrade-nss-util-debuginfo
  • redhat-upgrade-nss-util-devel

References

  • redhat-upgrade-nss
  • redhat-upgrade-nss-debuginfo
  • redhat-upgrade-nss-devel
  • redhat-upgrade-nss-pkcs11-devel
  • redhat-upgrade-nss-sysinit
  • redhat-upgrade-nss-tools
  • redhat-upgrade-nss-util
  • redhat-upgrade-nss-util-debuginfo
  • redhat-upgrade-nss-util-devel

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