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Files from Alexander Sotirov

Email addressasotirov at determina.com
First Active2007-05-10
Last Active2011-01-06
Bypassing Browser Memory Protections
Posted Jan 6, 2011
Authored by Mark Dowd, Alexander Sotirov

Whitepaper called Bypassing Browser Memory Protections.

tags | paper
SHA-256 | 4bb235b44799001d4a44274262b9d944e99bca3cb5b4c65e5344121784a5e29e
Internet Explorer Daxctle.OCX KeyFrame Method Heap Buffer Overflow Vulnerability
Posted Nov 26, 2009
Authored by Alexander Sotirov, skape | Site metasploit.com

This Metasploit module exploits a heap overflow vulnerability in the KeyFrame method of the direct animation ActiveX control. This is a port of the exploit implemented by Alexander Sotirov.

tags | exploit, overflow, activex
advisories | CVE-2006-4777
SHA-256 | ee23cf2762a7f51047b8075259d50984edeb1f3ca15637fe82e5757310a61103
Whitepaper - MD5 Considered Harmful Today
Posted Dec 31, 2008
Authored by Alexander Sotirov, Arjen Lenstra, Benne de Weger, Dag Arne Osvik, David Molnar, Jacob Appelbaum, Marc Stevens | Site win.tue.nl

MD5 Considered Harmful Today - Creating A Rogue CA Certificate. The authors of this paper have identified a vulnerability in the Internet Public Key Infrastructure (PKI) used to issue digital certificates for secure websites. As a proof of concept they executed a practical attack scenario and successfully created a rogue Certification Authority (CA) certificate trusted by all common web browsers. This certificate allows them to impersonate any website on the Internet, including banking and e-commerce sites secured using the HTTPS protocol.

tags | paper, web, protocol, proof of concept
SHA-256 | 7bc4a39c6558907b3bf4b6c5957b648d7c871e27bac56e6bbd00a2afbfd679f2
modprops-dos.txt
Posted May 10, 2007
Authored by Alexander Sotirov | Site determina.com

Determina Security Research has discovered a denial of service vulnerability in the code responsible for parsing iCal email attachments in Microsoft Exchange. This vulnerability can be exploited by a malicious email message and results in a denial of service. The vulnerable code is present in Exchange 2000 and 2003.

tags | advisory, denial of service
advisories | CVE-2007-0039
SHA-256 | ebab06b649822f2a01004927c501873f74ff5954cdb57c27bd9b844708cd3c6a
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