QID 239776

Date Published: 2021-11-10

QID 239776: Red Hat Update for thunderbird (RHSA-2021:4134)

mozilla thunderbird is a standalone mail and newsgroup client.

Security Fix(es):
  • mozilla: use-after-free in http2 session object
  • mozilla: memory safety bugs fixed in firefox 94 and firefox esr 91.3
  • mozilla: iframe sandbox rules did not apply to xslt stylesheets (cve-2021-38503)
  • mozilla: use-after-free in file picker dialog (cve-2021-38504)
  • mozilla: firefox could be coaxed into going into fullscreen mode without notification or warning (cve-2021-38506)
  • mozilla: opportunistic encryption in http2 could be used to bypass the same-origin-policy on services hosted on other ports (cve-2021-38507)
  • mozilla: permission prompt could be overlaid, resulting in user confusion and potential spoofing (cve-2021-38508)
  • mozilla: javascript alert box could have been spoofed onto an arbitrary domain (cve-2021-38509)

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 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 Medium - 4.2 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Refer to Refer to :
    Applying Package Updates to RHEL system     for details.

    Refer to Red Hat security advisory RHSA-2021:4134 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239776

    CVE-2021-38503 | CVE-2021-38504 | CVE-2021-38506 | CVE-2021-38507 | CVE-2021-38508 | CVE-2021-38509 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4134 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4134
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