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Red Hat Enterprise Linux 8 RHSA-2021-3157-01 Important: Firefox DoS

red hat
Calendar Grey August 16, 2021
Dist Redhat Esm H88
Crucial security patch for Mozilla Firefox on Red Hat Enterprise Linux 8 tackles severe vulnerabilities and improves overall reliability.
An update for firefox is now available for Red Hat Enterprise Linux 8

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.

Summary

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
This update upgrades Firefox to version 78.13.0 ESR.
Security Fix(es):
* Mozilla: Uninitialized memory in a canvas object could have led to memory corruption (CVE-2021-29980)
* Mozilla: Incorrect instruction reordering during JIT optimization (CVE-2021-29984)
* Mozilla: Race condition when resolving DNS names could have led to memory corruption (CVE-2021-29986)
* Mozilla: Memory corruption as a result of incorrect style treatment (CVE-2021-29988)
* Mozilla: Memory safety bugs fixed in Thunderbird 78.13 (CVE-2021-29989)
* Mozilla: Use-after-free media channels (CVE-2021-29985)
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.

Topics%20covered

Topics Covered

security advisory Red Hat DoS important firefox memory safety browser update

References

https://access.redhat.com/security/cve/CVE-2021-29980 https://access.redhat.com/security/cve/CVE-2021-29984 https://access.redhat.com/security/cve/CVE-2021-29985 https://access.redhat.com/security/cve/CVE-2021-29986 https://access.redhat.com/security/cve/CVE-2021-29988 https://access.redhat.com/security/cve/CVE-2021-29989 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: firefox-78.13.0-2.el8_4.src.rpm
aarch64: firefox-78.13.0-2.el8_4.aarch64.rpm firefox-debuginfo-78.13.0-2.el8_4.aarch64.rpm firefox-debugsource-78.13.0-2.el8_4.aarch64.rpm
ppc64le: firefox-78.13.0-2.el8_4.ppc64le.rpm firefox-debuginfo-78.13.0-2.el8_4.ppc64le.rpm firefox-debugsource-78.13.0-2.el8_4.ppc64le.rpm
s390x: firefox-78.13.0-2.el8_4.s390x.rpm firefox-debuginfo-78.13.0-2.el8_4.s390x.rpm firefox-debugsource-78.13.0-2.el8_4.s390x.rpm
x86_64: firefox-78.13.0-2.el8_4.x86_64.rpm firefox-debuginfo-78.13.0-2.el8_4.x86_64.rpm firefox-debugsource-78.13.0-2.el8_4.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3157-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3157
Issue date: 2021-08-16

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat DoS important firefox memory safety browser update

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1992417 - CVE-2021-29986 Mozilla: Race condition when resolving DNS names could have led to memory corruption

1992419 - CVE-2021-29988 Mozilla: Memory corruption as a result of incorrect style treatment

1992420 - CVE-2021-29984 Mozilla: Incorrect instruction reordering during JIT optimization

1992421 - CVE-2021-29980 Mozilla: Uninitialized memory in a canvas object could have led to memory corruption

1992422 - CVE-2021-29985 Mozilla: Use-after-free media channels

1992423 - CVE-2021-29989 Mozilla: Memory safety bugs fixed in Thunderbird 78.13

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