Insufficient UI warning of dangerous operations in Mozilla Firefox and Firefox ESR - CVE-2024-3863

Vulnerability identifier: #VU88636

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2024-3863

CWE-ID: CWE-357

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
Mozilla Firefox
Firefox ESR
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Enterprise Storage
Slackware Linux
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
SUSE Linux Enterprise Server 15 SP4 LTSS
Desktop Applications Module
SUSE Package Hub 15
openSUSE Leap
Fedora
Mozilla Thunderbird
mozilla-firefox
thunderbird
MozillaFirefox-debuginfo
MozillaFirefox-debugsource
MozillaFirefox-devel
MozillaFirefox-translations-common
MozillaFirefox
MozillaThunderbird-translations-other
MozillaThunderbird-translations-common
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaFirefox-branding-upstream
MozillaFirefox-translations-other

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to a missing warning when downloading .xrm-ms files. A remote attacker can trick the victim to download and execute arbitrary code on the system.

Note, the vulnerability affects Windows installations only.

Install updates from vendor's website.

• https://www.mozilla.org/en-US/security/advisories/mfsa2024-18/
• https://www.mozilla.org/en-US/security/advisories/mfsa2024-19/