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CVE-2010-1689

Status Candidate

Overview

The DNS implementation in smtpsvc.dll before 6.0.2600.5949 in Microsoft Windows 2000 SP4 and earlier, Windows XP SP3 and earlier, Windows Server 2003 SP2 and earlier, Windows Server 2008 SP2 and earlier, Windows Server 2008 R2, Exchange Server 2003 SP3 and earlier, Exchange Server 2007 SP2 and earlier, and Exchange Server 2010 uses predictable transaction IDs that are formed by incrementing a previous ID by 1, which makes it easier for man-in-the-middle attackers to spoof DNS responses, a different vulnerability than CVE-2010-0024 and CVE-2010-0025.

Related Files

Core Security Technologies Advisory 2010.0427
Posted May 5, 2010
Authored by Core Security Technologies | Site coresecurity.com

Core Security Technologies Advisory - Prior to MS10-024 the Windows SMTP Service generated DNS queries with trivially guessable values in the transaction ID field. The issue was addressed in MS10-024 by adding a call to the 'CAsyncDns::GenerateRandWord' method when building the DNS query. Prior to MS10-024 the Windows SMTP Service did not check that the value of the ID field of a DNS response received from the network actually matched the value of the ID field of a corresponding DNS query packet previously sent. The issue was addressed in MS10-024 by adding validation logic to the 'CAsyncDns::ProcessReadIO' method.

tags | advisory
systems | windows
advisories | CVE-2010-1689, CVE-2010-1690
SHA-256 | f9f3d7f24dfb5f26df59a62a6054cd9aaf1939a9958a82a13d2f856165222d6a
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