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Vulnerability of Mozilla NSS: information disclosure via HelloRetryRequest Lower Protocol Negotiation

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via HelloRetryRequest Lower Protocol Negotiation of Mozilla NSS, in order to obtain sensitive information.
Impacted software: Debian, Fedora, Firefox, NSS, Thunderbird, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 1/4.
Creation date: 21/01/2020.
Références of this announce: 1590001, CERTFR-2020-AVI-019, CVE-2019-17023, DLA-2061-1, DLA-2071-1, DSA-4600-1, DSA-4603-1, FEDORA-2020-01411d96d5, FEDORA-2020-72912bb14c, FEDORA-2020-9254bf8b94, FEDORA-2020-d18d24c943, FEDORA-2020-d4b0f42d01, MFSA-2020-01, MFSA-2020-02, MFSA-2020-04, openSUSE-SU-2020:0060-1, RHSA-2020:0085-01, RHSA-2020:0086-01, RHSA-2020:0111-01, RHSA-2020:0120-01, RHSA-2020:0123-01, RHSA-2020:0127-01, SSA:2020-006-01, SSA:2020-010-01, SSA:2020-024-01, SUSE-SU-2020:0068-1, SUSE-SU-2020:0078-1, SUSE-SU-2020:14268-1, USN-4234-1, USN-4241-1, VIGILANCE-VUL-31378.

Description of the vulnerability 

An attacker can bypass access restrictions to data via HelloRetryRequest Lower Protocol Negotiation of Mozilla NSS, in order to obtain sensitive information.
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This weakness note 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 threat note is low.

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

An attacker with a expert ability can exploit this computer weakness.

Solutions for this threat 

Mozilla NSS: version 3.49.
The version 3.49 is fixed:
  https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_49_RTM/src/

Firefox: version 72.
The version 72 is fixed:
  https://www.mozilla.org/en-US/firefox/new/

Firefox: version 68.4.
The version 68.4 is fixed:
  https://www.mozilla.org/fr/firefox/all/

Thunderbird: version 68.4.1.
The version 68.4.1 is fixed:
  https://www.thunderbird.net/en-US/

Debian 8: new firefox-esr packages.
New packages are available:
  Debian 8: firefox-esr 68.4.0esr-1~deb8u1

Debian 8: new thunderbird packages.
New packages are available:
  Debian 8: thunderbird 1:68.4.1-1~deb8u1

Debian 9/10: new firefox-esr packages.
New packages are available:
  Debian 9: firefox-esr 68.4.1esr-1~deb9u1
  Debian 10: firefox-esr 68.4.1esr-1~deb10u1

Debian 9/10: new thunderbird packages.
New packages are available:
  Debian 9: thunderbird 1:68.4.1-1~deb9u1
  Debian 10: thunderbird 1:68.4.1-1~deb10u1

Fedora 31: new firefox packages.
New packages are available:
  Fedora 31: firefox 72.0-2.fc31

Fedora: new nss packages.
New packages are available:
  Fedora 30: nss 3.49.0-1.fc30
  Fedora 31: nss 3.49.0-1.fc31

Fedora: new thunderbird packages.
New packages are available:
  Fedora 30: thunderbird 68.4.1-1.fc30
  Fedora 31: thunderbird 68.4.1-1.fc31

openSUSE Leap 15.1: new MozillaFirefox packages.
New packages are available:
  openSUSE Leap 15.1: MozillaFirefox 68.4.1-lp151.2.24.1

RHEL 6.10: new firefox packages.
New packages are available:
  RHEL 6.10: firefox 68.4.1-1.el6_10

RHEL 6.10: new thunderbird packages.
New packages are available:
  RHEL 6.10: thunderbird 68.4.1-2.el6_10

RHEL 7.7: new firefox packages.
New packages are available:
  RHEL 7.7: firefox 68.4.1-1.el7_7

RHEL 7.7: new thunderbird packages.
New packages are available:
  RHEL 7.7: thunderbird 68.4.1-2.el7_7

RHEL 8.1: new firefox packages.
New packages are available:
  RHEL 8.1: firefox 68.4.1-1.el8_1

RHEL 8.1: new thunderbird packages.
New packages are available:
  RHEL 8.1: thunderbird 68.4.1-2.el8_1

Slackware 14.2: new mozilla-thunderbird packages.
New packages are available:
  Slackware 14.2: mozilla-thunderbird 68.4.1-*-1_slack14.2

Slackware: new mozilla-firefox packages.
New packages are available:
  Slackware 14.2: mozilla-firefox 68.4.0esr-*-1_slack14.2

Slackware: new mozilla-thunderbird-68.4.2 packages.
New packages are available:
  Slackware 14.2: mozilla-thunderbird 68.4.2-*-1_slack14.2

SUSE LE 11 SP4: new MozillaFirefox packages.
New packages are available:
  SUSE LE 11 SP4: MozillaFirefox 68.4.1-78.57.1

SUSE LE 12: new MozillaFirefox packages.
New packages are available:
  SUSE LE 12 SP1: MozillaFirefox 68.4.1-109.101.1
  SUSE LE 12 SP2: MozillaFirefox 68.4.1-109.101.1
  SUSE LE 12 SP3: MozillaFirefox 68.4.1-109.101.1
  SUSE LE 12 SP4: MozillaFirefox 68.4.1-109.101.1
  SUSE LE 12 SP5: MozillaFirefox 68.4.1-109.101.1

SUSE LE 15: new MozillaFirefox packages.
New packages are available:
  SUSE LE 15 RTM: MozillaFirefox 68.4.1-3.66.1
  SUSE LE 15 SP1: MozillaFirefox 68.4.1-3.66.1

Ubuntu: new firefox packages.
New packages are available:
  Ubuntu 19.10: firefox 72.0.1+build1-0ubuntu0.19.10.1
  Ubuntu 19.04: firefox 72.0.1+build1-0ubuntu0.19.04.1
  Ubuntu 18.04 LTS: firefox 72.0.1+build1-0ubuntu0.18.04.1
  Ubuntu 16.04 LTS: firefox 72.0.1+build1-0ubuntu0.16.04.1

Ubuntu: new thunderbird packages.
New packages are available:
  Ubuntu 19.10: thunderbird 1:68.4.1+build1-0ubuntu0.19.10.1
  Ubuntu 18.04 LTS: thunderbird 1:68.4.1+build1-0ubuntu0.18.04.1
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