Advisory Details

April 28th, 2020

Adobe Bridge PostScript CharString Directory Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-20-557
ZDI-CAN-10046

CVE ID CVE-2020-9563
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 CharStrings in PostScript. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based 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/apsb20-19.html
DISCLOSURE TIMELINE
  • 2020-01-07 - Vulnerability reported to vendor
  • 2020-04-28 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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