QID 239191

Date Published: 2021-04-01

QID 239191: Red Hat Update for firefox (RHSA-2021:0992)

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.This update upgrades Firefox to version 78.9.0 ESR.

Security Fix(es): Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read (CVE-2021-23981) Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9 (CVE-2021-23987) Mozilla: Internal network hosts could have been probed by a malicious webpage (CVE-2021-23982) Mozilla: Malicious extensions could have spoofed popup information (CVE-2021-23984)

Affected Products:

Red Hat Enterprise Linux Server 7 x86_64
Red Hat Enterprise Linux Workstation 7 x86_64
Red Hat Enterprise Linux Desktop 7 x86_64
Red Hat Enterprise Linux for IBM z Systems 7 s390x
Red Hat Enterprise Linux for Power, big endian 7 ppc64
Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as High - 6.8 severity.
    • Solution
    Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

    Refer to Red Hat security advisory RHSA-2021:0992 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239191

    CVE-2021-23981 | CVE-2021-23982 | CVE-2021-23984 | CVE-2021-23987 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:0992 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:0992?language=en
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