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Vulnerability of Mozilla NSS: information disclosure via MPI Modular Inversion

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via MPI Modular Inversion of Mozilla NSS, in order to obtain sensitive information.
Vulnerable products: Debian, Fedora, Firefox, NSS, Thunderbird, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 18/06/2020.
Références of this bulletin: CERTFR-2020-AVI-448, CVE-2020-12402, DLA-2266-1, DSA-4726-1, FEDORA-2020-16741ac7ff, FEDORA-2020-3ef1937475, MFSA2020-29, openSUSE-SU-2020:0953-1, openSUSE-SU-2020:0955-1, openSUSE-SU-2020:0983-1, openSUSE-SU-2020:1017-1, RHSA-2020:3280-01, SSA:2020-181-01, SUSE-SU-2020:14418-1, SUSE-SU-2020:14421-1, SUSE-SU-2020:1839-1, SUSE-SU-2020:1850-1, USN-4417-1, USN-4417-2, VIGILANCE-VUL-32574.

Description of the vulnerability 

An attacker can bypass access restrictions to data via MPI Modular Inversion of Mozilla NSS, in order to obtain sensitive information.
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This computer weakness impacts software or systems such as Debian, Fedora, Firefox, NSS, Thunderbird, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this vulnerability note is medium.

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

An attacker with a expert ability can exploit this cybersecurity threat.

Solutions for this threat 

Mozilla NSS: version 3.53.1.
The version 3.53.1 is fixed:
  https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_53_1_RTM/src/

Debian 10: new nss packages.
New packages are available:
  Debian 10: nss 2:3.42.1-1+deb10u3

Debian 8: new nss packages.
New packages are available:
  Debian 8: nss 2:3.26-1+debu8u11

Fedora 31: new nspr packages.
New packages are available:
  Fedora 31: nspr 4.26.0-1.fc31

Fedora 31: new nss packages.
New packages are available:
  Fedora 31: nss 3.54.0-1.fc31

Fedora 32: new nspr packages.
New packages are available:
  Fedora 32: nspr 4.26.0-1.fc32

Fedora 32: new nss packages.
New packages are available:
  Fedora 32: nss 3.54.0-1.fc32

Mozilla Firefox: version 68.10.0.
The version 68.10.0 is fixed:
  https://www.mozilla.org/en-US/firefox/enterprise/
  https://www.mozilla.org/en-US/firefox/68.10.0/releasenotes/

Mozilla Firefox: version 78.0.
The version 78.0 is fixed:
  https://www.mozilla.org/fr/firefox/download/thanks/
  https://www.mozilla.org/en-US/firefox/78.0/releasenotes/

Mozilla Thunderbird: version 78.0.
The version 78.0 is fixed:
  https://www.thunderbird.net/fr/

openSUSE Leap 15.1: new MozillaFirefox packages.
New packages are available:
  openSUSE Leap 15.1: MozillaFirefox 78.0.1-lp151.2.53.1

openSUSE Leap 15.2: new MozillaFirefox packages.
New packages are available:
  openSUSE Leap 15.2: MozillaFirefox 78.0.1-lp152.2.5.1

openSUSE Leap 15: new mozilla-nss packages.
New packages are available:
  openSUSE Leap 15.1: mozilla-nss 3.53.1-lp151.2.26.1
  openSUSE Leap 15.2: mozilla-nss 3.53.1-lp152.2.4.1

RHEL 8.2: new nss/nspr packages.
New packages are available:
  RHEL 8.2: nspr 4.25.0-2.el8_2, nss 3.53.1-11.el8_2

Slackware: new mozilla-firefox packages.
New packages are available:
  Slackware 14.2: mozilla-firefox 68.10.0esr-*-1_slack14.2

SUSE LE 11 SP4: new MozillaFirefox packages.
New packages are available:
  SUSE LE 11 SP4: MozillaFirefox 78.0.1-78.80.2

SUSE LE 11 SP4: new mozilla-nspr/mozilla-nss packages.
New packages are available:
  SUSE LE 11 SP4: mozilla-nspr 4.25-29.12.2, mozilla-nss 3.53.1-38.23.1

SUSE LE 12: new mozilla-nspr/mozilla-nss packages.
New packages are available:
  SUSE LE 12 SP2: mozilla-nspr 4.25-19.15.1, mozilla-nss 3.53.1-58.48.1
  SUSE LE 12 SP3: mozilla-nspr 4.25-19.15.1, mozilla-nss 3.53.1-58.48.1
  SUSE LE 12 SP4: mozilla-nspr 4.25-19.15.1, mozilla-nss 3.53.1-58.48.1
  SUSE LE 12 SP5: mozilla-nspr 4.25-19.15.1, mozilla-nss 3.53.1-58.48.1

SUSE LE 15: new mozilla-nss packages.
New packages are available:
  SUSE LE 15 RTM: mozilla-nss 3.53.1-3.45.1
  SUSE LE 15 SP2: mozilla-nss 3.53.1-3.45.1
  SUSE LE 15 SP2: mozilla-nss 3.53.1-3.45.1

Ubuntu: new libnss3 packages.
New packages are available:
  Ubuntu 20.04 LTS: libnss3 2:3.49.1-1ubuntu1.2
  Ubuntu 19.10: libnss3 2:3.45-1ubuntu2.4
  Ubuntu 18.04 LTS: libnss3 2:3.35-2ubuntu2.9
  Ubuntu 16.04 LTS: libnss3 2:3.28.4-0ubuntu0.16.04.12
  Ubuntu 14.04 ESM: libnss3 2:3.28.4-0ubuntu0.14.04.5+esm6
  Ubuntu 12.04 ESM: libnss3 2:3.28.4-0ubuntu0.12.04.9

Wind River Linux: version 10.19.45.12.
The version 10.19.45.12 is fixed:
  https://support2.windriver.com/index.php?page=cve&on=list&show=50&product_id=1&product_version%5B0%5D=24&id_status%5B0%5D=4&cve_id_filter=&s=&submit=&order_by=cve_modified_date&order_way=desc#list
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