Investintech.com's SlimPDF viewer contains multiple vulnerabilities which may result in a denial of service and possibly arbitrary code execution.
Investintech.com's SlimPDF viewer contains multiple vulnerabilities, which include; user mode write access violations, read access violations on block data moves, write addresses being controlled by data from faulting instructions, data from faulting addresses control branch selection, and tainted data is passed to function calls. These vulnerabilities may be exploitable to leverage arbitrary code execution with the privileges of the user running the vulnerable application. If vulnerable code is shared among other Investintech.com products they may also be affected. It has been reported that the following applications are susceptible to a denial of service crash, which may possibly lead to arbitrary code execution: Able2Doc, Able2Doc Professional, Able2Extract, Absolute PDF Server, and Able2Extract Server.
By convincing a user to open an untrusted specially-crafted
Apply an Update
Investintech.com has released the following versions to address these issues in SlimPDF Reader and related products.
Slim PDF Reader v22.214.171.124:
Able2Doc Std 126.96.36.199:
Able2Doc Pro 188.8.131.52:
Able2Extract Std 184.108.40.206:
Able2Extract Pro 220.127.116.11:
Use the Microsoft Enhanced Mitigation Experience Toolkit
The Microsoft Enhanced Mitigation Experience Toolkit (EMET) can be used to help prevent exploitation of these vulnerabilities.
Enable DEP in Microsoft Windows
Consider enabling Data Execution Prevention (DEP) in supported versions of Windows. DEP should not be treated as a complete workaround, but it can mitigate the execution of attacker-supplied code in some cases. Microsoft has published detailed technical information about DEP in Security Research & Defense blog posts "Understanding DEP as a mitigation technology" part 1 and part 2. DEP should be used in conjunction with the application of patches or other mitigations described in this document.
Note that when relying on DEP for exploit mitigation, it is important to use a system that supports Address Space Layout Randomization (ASLR) as well. ASLR is not supported by Windows XP or Windows Server 2003 or earlier. ASLR was introduced with Microsoft Windows Vista and Windows Server 2008. Please see the Microsoft SRD blog entry: On the effectiveness of DEP and ASLR for more details.
Vendor| Status| Date Notified| Date Updated
Investintech.com Inc| | 22 Mar 2011| 15 Sep 2011
If you are a vendor and your product is affected, let us know.
Group | Score | Vector
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | N/A | N/A
Thanks to Carlos Mario Penagos Hollmann of Synapse Information Technology for reporting this vulnerability.
This document was written by Jared Allar.