USN-6747-2: Firefox regressions

Releases

• Ubuntu 20.04 LTS

Packages

• firefox - Mozilla Open Source web browser

Details

USN-6747-1 fixed vulnerabilities in Firefox. The update introduced
several minor regressions. This update fixes the problem.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information across domains, or execute arbitrary code. (CVE-2024-3852,
CVE-2024-3864, CVE-2024-3865)

Bartek Nowotarski discovered that Firefox did not properly limit HTTP/2
CONTINUATION frames. An attacker could potentially exploit this issue to
cause a denial of service. (CVE-2024-3302)

Gary Kwong discovered that Firefox did not properly manage memory when
running garbage collection during realm initialization. An attacker could
potentially exploit this issue to cause a denial of service, or execute
arbitrary code. (CVE-2024-3853)

Lukas Bernhard discovered that Firefox did not properly manage memory
during JIT optimisations, leading to an out-of-bounds read vulnerability.
An attacker could possibly use this issue to cause a denial of service or
expose sensitive information. (CVE-2024-3854, CVE-2024-3855)

Nan Wang discovered that Firefox did not properly manage memory during
WASM garbage collection. An attacker could potentially exploit this issue
to cause a denial of service, or execute arbitrary code. (CVE-2024-3856)

Lukas Bernhard discovered that Firefox did not properly manage memory
when handling JIT created code during garbage collection. An attacker
could potentially exploit this issue to cause a denial of service, or
execute arbitrary code. (CVE-2024-3857)

Lukas Bernhard discovered that Firefox did not properly manage memory when
tracing in JIT. An attacker could potentially exploit this issue to cause
a denial of service. (CVE-2024-3858)

Ronald Crane discovered that Firefox did not properly manage memory in the
OpenType sanitizer on 32-bit devices, leading to an out-of-bounds read
vulnerability. An attacker could possibly use this issue to cause a denial
of service or expose sensitive information. (CVE-2024-3859)

Garry Kwong discovered that Firefox did not properly manage memory when
tracing empty shape lists in JIT. An attacker could potentially exploit
this issue to cause a denial of service. (CVE-2024-3860)

Ronald Crane discovered that Firefox did not properly manage memory when
handling an AlignedBuffer. An attacker could potentially exploit this
issue to cause denial of service, or execute arbitrary code.
(CVE-2024-3861)

Ronald Crane discovered that Firefox did not properly manage memory when
handling code in MarkStack. An attacker could possibly use this issue to
cause a denial of service or execute arbitrary code. (CVE-2024-3862)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04

• firefox - 125.0.3+build1-0ubuntu0.20.04.1

After a standard system update you need to restart Firefox to make all the
necessary changes.

References

• https://launchpad.net/bugs/2064553