Sense of Security – Security Advisory – SOS-10-003
| Release Date. | 6-Oct-2010 |
| Last Update. | – |
| Vendor Notification Date. | 26-Jul-2010 |
| Product. | Adobe Reader |
| Adobe Acrobat | |
| Platform. | 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. | Upgrade to 9.4 (as advised by Adobe) |
| CVE reference. | CCVE-2010-3630 |
Details.
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 results 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:
push ebp
mov ebp, esp
sub esp, 1Ch
and [ebp+var_4], 0
push ebx
push esi
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 ECX register. Part disassembly of the function is shown below:
mov 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.
Proof of Concept.
Proof of concept PDF files are available to Sense of Security customers upon request.
Solution.
A patch is available from Adobe and is included in the next release (9.4).
Discovered by.
Brett Gervasoni from Sense of Security Labs.