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Vulnerability of Mozilla NSS: memory corruption via sftk_FreeSession

Synthesis of the vulnerability 

An attacker can trigger a memory corruption via sftk_FreeSession() of Mozilla NSS, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Fedora, Firefox, NSS, Solaris, RHEL, Ubuntu.
Severity of this alert: 3/4.
Creation date: 04/11/2019.
Références of this alert: CVE-2019-11756, FEDORA-2019-4175e7cb56, FEDORA-2019-8934d55352, FEDORA-2019-e4c45e113c, MFSA-2019-36, MFSA-2019-37, RHSA-2020:3280-01, RHSA-2020:4076-01, USN-4216-1, VIGILANCE-VUL-30767.

Description of the vulnerability 

An attacker can trigger a memory corruption via sftk_FreeSession() of Mozilla NSS, in order to trigger a denial of service, and possibly to run code.
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This weakness bulletin impacts software or systems such as Fedora, Firefox, NSS, Solaris, RHEL, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness is important.

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

An attacker with a expert ability can exploit this vulnerability announce.

Solutions for this threat 

Mozilla NSS: version 3.47.
The version 3.47 is fixed:
  http://ftp.mozilla.org/pub/security/nss/releases/

Fedora: new nspr packages.
New packages are available:
  Fedora 29: nspr 4.23.0-1.fc29
  Fedora 30: nspr 4.23.0-1.fc30
  Fedora 31: nspr 4.23.0-1.fc31

Fedora: new nss packages.
New packages are available:
  Fedora 30: nss 3.47.0-2.fc30
  Fedora 31: nss 3.47.0-2.fc31

Firefox: version 68.3.
The version 68.3 is fixed:
  https://www.mozilla.org/en-US/firefox/new/

Firefox: version 71.
The version 71 is fixed:
  https://www.mozilla.org/en-US/firefox/new/

Oracle Solaris: patch for third party software of July 2020 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 7.9: new nss/nspr packages.
New packages are available:
  RHEL 7.9: nspr 4.25.0-2.el7_9, nss 3.53.1-3.el7_9

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

Ubuntu: new firefox packages.
New packages are available:
  Ubuntu 19.10: firefox 71.0+build5-0ubuntu0.19.10.1
  Ubuntu 19.04: firefox 71.0+build5-0ubuntu0.19.04.1
  Ubuntu 18.04 LTS: firefox 71.0+build5-0ubuntu0.18.04.1

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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