RHSA-2023:7508 - Security Advisory

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 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 115.5.0 ESR.

Security Fix(es):

• Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer (CVE-2023-6204)
• Mozilla: Use-after-free in MessagePort::Entangled (CVE-2023-6205)
• Mozilla: Clickjacking permission prompts using the fullscreen transition (CVE-2023-6206)
• Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer (CVE-2023-6207)
• Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5 (CVE-2023-6212)
• Mozilla: Using Selection API would copy contents into X11 primary selection. (CVE-2023-6208)
• Mozilla: Incorrect parsing of relative URLs starting with "///" (CVE-2023-6209)

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 for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64

Fixes

• BZ - 2250896 - CVE-2023-6204 Mozilla: Out-of-bound memory access in WebGL2 blitFramebuffer
• BZ - 2250897 - CVE-2023-6205 Mozilla: Use-after-free in MessagePort::Entangled
• BZ - 2250898 - CVE-2023-6206 Mozilla: Clickjacking permission prompts using the fullscreen transition
• BZ - 2250899 - CVE-2023-6207 Mozilla: Use-after-free in ReadableByteStreamQueueEntry::Buffer
• BZ - 2250900 - CVE-2023-6208 Mozilla: Using Selection API would copy contents into X11 primary selection.
• BZ - 2250901 - CVE-2023-6209 Mozilla: Incorrect parsing of relative URLs starting with "///"
• BZ - 2250902 - CVE-2023-6212 Mozilla: Memory safety bugs fixed in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5

CVEs

• CVE-2023-6204
• CVE-2023-6205
• CVE-2023-6206
• CVE-2023-6207
• CVE-2023-6208
• CVE-2023-6209
• CVE-2023-6212

References

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