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CVE-2010-0231

Status Candidate

Overview

The SMB implementation in the Server service in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 does not use a sufficient source of entropy, which allows remote attackers to obtain access to files and other SMB resources via a large number of authentication requests, related to server-generated challenges, certain "duplicate values," and spoofing of an authentication token, aka "SMB NTLM Authentication Lack of Entropy Vulnerability."

Related Files

Windows SMB NTLM Authentication Weak Nonce
Posted Feb 10, 2010
Authored by Hernan Ochoa, Agustin Azubel | Site hexale.org

Flaws in Microsoft's implementation of the NTLM challenge-response authentication protocol causing the server to generate duplicate challenges/nonces and an information leak allow an unauthenticated remote attacker without any kind of credentials to access the SMB service of the target system under the credentials of an authorized user. Depending on the privileges of the user, the attacker will be able to obtain and modify files on the target system and execute arbitrary code. Proof of concept exploit included.

tags | exploit, remote, arbitrary, protocol, proof of concept
advisories | CVE-2010-0231
SHA-256 | 6b3ebf2a7a39c7c5203cde6f4027d748b138e372cc4996244b973486d32706b4
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