FILE-PDF Adobe Acrobat Pro HTML image input element use-after-free attempt
This event is generated when a crafted HTML file designed to exploit Adobe Acrobat Pro traverses the network.
Attempted User Privilege Gain
This vulnerability is due to a dangling pointer that leads to a use after free vulnerability in in HTML processing / conversion engine when handing image definition elements. Specifically, the vulnerability is triggered by a crafted image input element within HTML file which leads to a temporal safety violation if it is possible to perform read / write dereferences on the dangling pointer. This instance causes access violation exception because of the computation within the HTML conversion engine that dereferences the dangling pointer. A constraint for exploitation of this vulnerability is that the memory area of the freed (i.e., old) object is reused by another object. The mismatch between the old and the new object can provide attacker with an unintended memory access -- potentially leading to code corruption or control-flow hijack attack. Successful exploitation could lead to arbitrary code execution.
- Acrobat Pro (v. 2018.011.20040) on Windows 7 (x86)
Ease of attack
Please follow corporate patch and update procedures.
- Cisco's Talos Intelligence Group