Advisory Details

September 27th, 2023

Mozilla Firefox JIT Boolean Conversion Uninitialized Variable Remote Code Execution Vulnerability

ZDI-23-1467
ZDI-CAN-18594

CVE ID
CVSS SCORE 5.4, AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
AFFECTED VENDORS Mozilla
AFFECTED PRODUCTS Firefox
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the implementation of boolean conversions in the JIT engine. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Mozilla has issued an update to correct this vulnerability. More details can be found at:
https://bugzilla.mozilla.org/show_bug.cgi?id=1788528
DISCLOSURE TIMELINE
  • 2022-08-31 - Vulnerability reported to vendor
  • 2023-09-27 - Coordinated public release of advisory
CREDIT Hossein Lotfi of Trend Micro Zero Day Initiative
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