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Critical Warning: Firefox Buffer Overflow in Red Hat Enterprise Linux 8

red hat
Calendar Grey May 6, 2020
Dist Redhat Esm H88
Mozilla has released a crucial update for Firefox on Red Hat Enterprise Linux 8, fixing vulnerabilities that may threaten user security and stability.
An update for firefox is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

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 68.8.0 ESR.
Security Fix(es):
* Mozilla: Use-after-free during worker shutdown (CVE-2020-12387)
* Mozilla: Memory safety bugs fixed in Firefox 76 and Firefox ESR 68.8 (CVE-2020-12395)
* Mozilla: Buffer overflow in SCTP chunk input validation (CVE-2020-6831)
* Mozilla: Arbitrary local file access with 'Copy as cURL' (CVE-2020-12392)
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 security issue buffer overflow critical Red Hat Enterprise Linux firefox memory safety

References

https://access.redhat.com/security/cve/CVE-2020-6831 https://access.redhat.com/security/cve/CVE-2020-12387 https://access.redhat.com/security/cve/CVE-2020-12392 https://access.redhat.com/security/cve/CVE-2020-12395 https://access.redhat.com/security/updates/classification#critical

Package List

Red Hat Enterprise Linux AppStream E4S (v. 8.0):
Source: firefox-68.8.0-1.el8_0.src.rpm
aarch64: firefox-68.8.0-1.el8_0.aarch64.rpm firefox-debuginfo-68.8.0-1.el8_0.aarch64.rpm firefox-debugsource-68.8.0-1.el8_0.aarch64.rpm
ppc64le: firefox-68.8.0-1.el8_0.ppc64le.rpm firefox-debuginfo-68.8.0-1.el8_0.ppc64le.rpm firefox-debugsource-68.8.0-1.el8_0.ppc64le.rpm
s390x: firefox-68.8.0-1.el8_0.s390x.rpm firefox-debuginfo-68.8.0-1.el8_0.s390x.rpm firefox-debugsource-68.8.0-1.el8_0.s390x.rpm
x86_64: firefox-68.8.0-1.el8_0.x86_64.rpm firefox-debuginfo-68.8.0-1.el8_0.x86_64.rpm firefox-debugsource-68.8.0-1.el8_0.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
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:2033-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2033
Issue date: 2020-05-06

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.0Update Services for SAP Solutions.Red Hat Product Security has rated this update as having a security impactof Critical. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue buffer overflow critical Red Hat Enterprise Linux firefox memory safety

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1831761 - CVE-2020-12387 Mozilla: Use-after-free during worker shutdown

1831763 - CVE-2020-6831 Mozilla: Buffer overflow in SCTP chunk input validation

1831764 - CVE-2020-12392 Mozilla: Arbitrary local file access with 'Copy as cURL'

1831765 - CVE-2020-12395 Mozilla: Memory safety bugs fixed in Firefox 76 and Firefox ESR 68.8

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