Advisory Details

April 15th, 2021

Adobe Bridge TTF Font Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-21-418
ZDI-CAN-12536

CVE ID CVE-2021-21095
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Bridge
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Adobe Bridge. 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 processing of embedded fonts. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Adobe has issued an update to correct this vulnerability. More details can be found at:
https://helpx.adobe.com/security/products/bridge/apsb21-23.html
DISCLOSURE TIMELINE
  • 2021-01-05 - Vulnerability reported to vendor
  • 2021-04-15 - Coordinated public release of advisory
CREDIT Tran Van Khang - khangkito (VinCSS)
BACK TO ADVISORIES