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Vulnerability of Mozilla NSS: information disclosure via Small Subgroup Confinement Attack

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Small Subgroup Confinement Attack of Mozilla NSS, in order to obtain sensitive information.
Vulnerable systems: Blue Coat CAS, Security Directory Server, NSS, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 2/4.
Creation date: 16/11/2016.
Références of this weakness: 1391818, 2000347, CVE-2016-8635, RHSA-2016:2779-01, SA137, SUSE-SU-2017:1175-1, SUSE-SU-2017:1248-1, SYMSA1391, USN-3163-1, VIGILANCE-VUL-21128.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Small Subgroup Confinement Attack of Mozilla NSS, in order to obtain sensitive information.
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This computer vulnerability impacts software or systems such as Blue Coat CAS, Security Directory Server, NSS, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this weakness bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of LAN.

An attacker with a expert ability can exploit this weakness.

Solutions for this threat 

Mozilla NSS: version 3.21.3.
The version 3.21.3 is fixed:
  https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_21_3_RTM/src/

Blue Coat Content Analysis System: solution for NSS.
The solution is indicated in information sources.

IBM Security Directory Suite: version 8.0.1.1.
The version 8.0.1.1 is fixed:
  https://www.ibm.com/support/fixcentral/swg/selectFixes?product=ibm%2FTivoli%2FIBM+Security+Directory+Suite&fixids=8.0.1.1-ISS-ISDS_20170301-2234.pkg&function=fixId&parent=IBM%20Security

RHEL: new nss packages.
New packages are available:
  RHEL 5: nss 3.21.3-2.el5_11
  RHEL 6: nss 3.21.3-2.el6_8
  RHEL 7: nss 3.21.3-2.el7_3

SUSE LE 11: new MozillaFirefox packages (04/05/2017).
New packages are available:
  SUSE LE 11 SP3: MozillaFirefox 45.9.0esr-71.2, mozilla-nspr 4.13.1-32.1, mozilla-nss 3.29.5-46.1
  SUSE LE 11 SP4: MozillaFirefox 45.9.0esr-71.2, mozilla-nspr 4.13.1-32.1, mozilla-nss 3.29.5-46.1

SUSE LE 12: new MozillaFirefox packages (12/05/2017).
New packages are available:
  SUSE LE 12 RTM: MozillaFirefox 45.9.0esr-105.1, mozilla-nspr 4.13.1-18.1, mozilla-nss 3.29.5-57.1
  SUSE LE 12 SP1: MozillaFirefox 45.9.0esr-105.1, java-1_8_0-openjdk 1.8.0.121-23.4, mozilla-nspr 4.13.1-18.1, mozilla-nss 3.29.5-57.1
  SUSE LE 12 SP2: MozillaFirefox 45.9.0esr-105.1, java-1_8_0-openjdk 1.8.0.121-23.4, mozilla-nspr 4.13.1-18.1, mozilla-nss 3.29.5-57.1

Ubuntu: new libnss3 packages.
New packages are available:
  Ubuntu 16.10: libnss3 2:3.26.2-0ubuntu0.16.10.1
  Ubuntu 16.04 LTS: libnss3 2:3.26.2-0ubuntu0.16.04.2
  Ubuntu 14.04 LTS: libnss3 2:3.26.2-0ubuntu0.14.04.3
  Ubuntu 12.04 LTS: libnss3 2:3.26.2-0ubuntu0.12.04.1

Wind River Linux: solution (28/11/2018).
The solution is indicated in information sources.
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