Advisory Details

February 21st, 2018

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

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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