SRC-2019-0060 : Adobe Photoshop CC Type 1 Font FontBBox array Stack Buffer Overflow Remote Code Execution Vulnerability

CVE ID:

CVE-2019-7973

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:

Photoshop CC

Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Photoshop CC. 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 PostScript files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Vendor Response:

Adobe has issued an update to correct this vulnerability. More details can be found at:
https://helpx.adobe.com/security/products/photoshop/apsb19-44.html

Disclosure Timeline:

  • 2019-04-04 – Verified and acquired by iDefense
  • 2019-08-15 – Coordinated public release of advisory

Proof of Concept:

/pocs/src-2019-0060.ps.txt

Credit:

This vulnerability was discovered by Steven Seeley (mr_me) of Source Incite

Acknowledgments:

Source Incite would like to acknowledge iDefense's Vulnerability Contributor Program for the help with co-ordination of this vulnerability.