oss-security - CVE-2018-1312: Weak Digest auth nonce generation in mod_auth

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Message-Id: <E1ezZFo-00031p-ID@romulus.home.bitnebula.com>
Date: Fri, 23 Mar 2018 21:50:00 -0500
From: Daniel Ruggeri <druggeri@...che.org>
To: announce@...pd.apache.org, oss-security@...ts.openwall.com,
    security@...pd.apache.org
Subject: CVE-2018-1312: Weak Digest auth nonce generation in mod_auth_digest

CVE-2018-1312: Weak Digest auth nonce generation in mod_auth_digest

Severity: Low

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.2.0 to 2.4.29

Description:
When generating an HTTP Digest authentication challenge, the nonce
sent to prevent reply attacks was not correctly generated using a
pseudo-random seed.  In a cluster of servers using a common Digest
authentication configuration, HTTP requests could be replayed across
servers by an attacker without detection.

Mitigation:
All httpd users should upgrade to 2.4.30 or later.

Credit:
The issue was discovered by Nicolas Daniels.

References:
https://httpd.apache.org/security/vulnerabilities_24.html

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