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Apache mod_digest Cross Realm Replay Security Issue
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Secunia Advisory:
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SA10789
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Release Date:
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2004-02-04
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Last Update:
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2004-05-10
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Critical:
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Less critical
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Impact:
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Security Bypass Spoofing
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Apache 1.3.x
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| | CVE reference: | CVE-2003-0987 (Secunia mirror)
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Description: Dirk-Willem van Gulik has identified a security issue in Apache mod_digest, which potentially can be exploited by malicious people to gain unauthorised access to other websites.
The problem is that a replay attack can be conducted by sending the digest authentication credentials again to a different website using htdigest protection, because the "nonce" implementation is weak.
Successful exploitation requires that a person is able to sniff network traffic and thereby capture the credentials.
The vulnerability affects Apache 1.3.29 and prior.
Solution: The vulnerability has been fixed in Apache 1.3.31-dev, allowing administrators to configure a secret "nonce".
Always use HTTPS on websites requiring authentication.
Provided and/or discovered by: Dirk-Willem van Gulik
Changelog: 2004-05-10: Updated "Solution" section.
Original Advisory: http://www.mail-archive.com/dev@httpd.apache.org/msg19007.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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