Security update for MozillaFirefox, mozilla-nspr, mozilla-nss (important)

This update for MozillaFirefox, mozilla-nspr, mozilla-nss fixes the
following issues:

Mozilla Firefox was updated to 38.7.0 ESR (bsc#969894)

• MFSA 2016-16/CVE-2016-1952/CVE-2016-1953 Miscellaneous memory safety
  hazards (rv:45.0 / rv:38.7)
• MFSA 2016-17/CVE-2016-1954 Local file overwriting and potential
  privilege escalation through CSP reports
• MFSA 2016-20/CVE-2016-1957 A memory leak in libstagefright when deleting
  an array during MP4 processing was fixed.
• MFSA 2016-21/CVE-2016-1958 The displayed page address can be overridden
• MFSA 2016-23/CVE-2016-1960 A use-after-free in HTML5 string parser was
  fixed.
• MFSA 2016-24/CVE-2016-1961 A use-after-free in SetBody was fixed.
• MFSA 2016-25/CVE-2016-1962 A use-after-free when using multiple WebRTC
  data channels was fixed.
• MFSA 2016-27/CVE-2016-1964 A use-after-free during XML transformations
  was fixed.
• MFSA 2016-28/CVE-2016-1965 Addressbar spoofing though history navigation
  and Location protocol property was fixed.
• MFSA 2016-31/CVE-2016-1966 Memory corruption with malicious NPAPI plugin
  was fixed.
• MFSA 2016-34/CVE-2016-1974 A out-of-bounds read in the HTML parser
  following a failed allocation was fixed.
• MFSA 2016-35/CVE-2016-1950 A buffer overflow during ASN.1 decoding in
  NSS was fixed.
• MFSA 2016-37/CVE-2016-1977/CVE-2016-2790/CVE-2016-2791/
  CVE-2016-2792/CVE-2016-2793/CVE-2016-2794/CVE-2016-2795/
  CVE-2016-2796/CVE-2016-2797/CVE-2016-2798/CVE-2016-2799/
  CVE-2016-2800/CVE-2016-2801/CVE-2016-2802 Various font vulnerabilities
  were fixed in the embedded Graphite 2 library

Mozilla NSS was updated to fix:

• MFSA 2016-15/CVE-2016-1978 Use-after-free in NSS during SSL connections
  in low memory
• MFSA 2016-35/CVE-2016-1950 Buffer overflow during ASN.1 decoding in NSS
• MFSA 2016-36/CVE-2016-1979 Use-after-free during processing of DER
  encoded keys in NSS

Mozilla NSPR was updated to version 4.12 (bsc#969894)

• added a PR_GetEnvSecure function, which attempts to detect if the
  program is being executed with elevated privileges, and returns NULL if
  detected. It is recommended to use this function in general purpose
  library code.
• fixed a memory allocation bug related to the PR_*printf functions
• exported API PR_DuplicateEnvironment, which had already been added in
  NSPR 4.10.9
• added support for FreeBSD aarch64
• several minor correctness and compatibility fixes
• Enable atomic instructions on mips (bmo#1129878)
• Fix mips assertion failure when creating thread with custom stack size
  (bmo#1129968)