06 Oct Security Advisory – SOS-10-003 – Adobe Reader 9.3.4 Multiple Memory Corruption Vulnerabilities
Release Date: 06-Oct-2010
Last Update: –
Vendor Notification Date: 26-Jul-2010
Product: Adobe Reader
Platform: Microsoft Windows
Affected versions: 9.3.4 verified and possibly others
Severity Rating: Medium
Impact: Denial of service, potentially code execution.
Attack Vector: Local system
Solution Status: Vendor patch
CVE reference: CVE-2010-3630
Adobe Reader is a popular freeware PDF viewer. Version 9.3.4 of the application is vulnerable to multiple memory corruption vulnerabilities. By sending specially crafted PDF files it is possible to cause memory corruption in the 3difr and AcroRd32.dll modules. Both issues trigger a null pointer condition which result in an access violation. The issue in AcroRd32.dll is triggered when Adobe Reader is closed.
Function sub_60AF56 in AcroRd32.dll access violates when attempting to read data pointed to by the ESI register. Part disassembly of the function is shown below:
mov ebp, esp
sub esp, 1Ch
and [ebp+var_4], 0
mov esi, ecx
mov ebx, [esi+23Ch] <– crash
Function sub_1000EEE0 in 3difr also access violates when attempting to read data pointed to by the ESI register the ECX register. Part disassembly of the function is shown below:
move ecx, [eax+4]
mov eax, [edx+4]
mov dx, [eax]
cmp dx, [ecx] <– crash
jnz short loc_1000EF87
It may be possible to exploit these vulnerabilities to execute arbitrary code under the context of the user running Adobe Reader.
Please refer to the PDF version of this advisory for proof of concept code examples.
A patch is available from Adobe and is included in the next release (9.4).
Brett Gervasoni from Sense of Security Labs.