RHSA-2021:1363 - Security Advisory

Topic

An update for firefox is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 78.10.0 ESR.

Security Fix(es):

• Mozilla: Out of bound write due to lazy initialization (CVE-2021-23994)
• Mozilla: Use-after-free in Responsive Design Mode (CVE-2021-23995)
• Mozilla: More internal network hosts could have been probed by a malicious webpage (CVE-2021-23961)
• Mozilla: Secure Lock icon could have been spoofed (CVE-2021-23998)
• Mozilla: Blob URLs may have been granted additional privileges (CVE-2021-23999)
• Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL (CVE-2021-24002)
• Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads (CVE-2021-29945)
• Mozilla: Port blocking could be bypassed (CVE-2021-29946)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the update, Firefox must be restarted for the changes to take effect.

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

Fixes

• BZ - 1951364 - CVE-2021-23994 Mozilla: Out of bound write due to lazy initialization
• BZ - 1951365 - CVE-2021-23995 Mozilla: Use-after-free in Responsive Design Mode
• BZ - 1951366 - CVE-2021-23998 Mozilla: Secure Lock icon could have been spoofed
• BZ - 1951367 - CVE-2021-23961 Mozilla: More internal network hosts could have been probed by a malicious webpage
• BZ - 1951368 - CVE-2021-23999 Mozilla: Blob URLs may have been granted additional privileges
• BZ - 1951369 - CVE-2021-24002 Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL
• BZ - 1951370 - CVE-2021-29945 Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads
• BZ - 1951371 - CVE-2021-29946 Mozilla: Port blocking could be bypassed

CVEs

• CVE-2021-23961
• CVE-2021-23994
• CVE-2021-23995
• CVE-2021-23998
• CVE-2021-23999
• CVE-2021-24002
• CVE-2021-29945
• CVE-2021-29946

References

• https://access.redhat.com/security/updates/classification/#important