Advisory Details

February 21st, 2018

Adobe Acrobat Pro DC ImageConversion XPS TIFF dir count Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-18-170
ZDI-CAN-5463

CVE ID CVE-2018-4904
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 Pro 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 parsing of the TIFF dir count attribute in XPS 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 heap-based buffer. An attacker can leverage this vulnerability to execute 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/apsb18-02.html
DISCLOSURE TIMELINE
  • 2017-12-19 - Vulnerability reported to vendor
  • 2018-02-21 - Coordinated public release of advisory
  • 2018-02-21 - Advisory Updated
CREDIT Ke Liu of Tencent's Xuanwu LAB
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