Advisory Details

October 13th, 2015

Adobe Acrobat Signature signatureSetSeed Use-After-Free Remote Code Execution Vulnerability

ZDI-15-473
ZDI-CAN-3017

CVE ID CVE-2015-6693
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Acrobat Pro DC
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Acrobat DC. 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 signatureSetSeedValue method. Specially crafted arguments passed to signatureSetSeedValue can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute arbitrary code under 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/acrobat/apsb15-24.html
DISCLOSURE TIMELINE
  • 2015-06-23 - Vulnerability reported to vendor
  • 2015-10-13 - Coordinated public release of advisory
CREDIT AbdulAziz Hariri - HP Zero Day Initiative
BACK TO ADVISORIES