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Category:   Application (Web Server/CGI)  >   Apache HTTPD Vendors:   Apache Software Foundation
Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
SecurityTracker Alert ID:  1038906
SecurityTracker URL:  http://securitytracker.com/id/1038906
CVE Reference:   CVE-2017-9788   (Links to External Site)
Date:  Jul 13 2017
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.2.33 and 2.4.26
Description:   A vulnerability was reported in Apache mod_auth_digest. A remote user can cause the target service to crash. A remote user can obtain potentially sensitive information on the target system.

The mod_auth_digest component does not properly initialize memory used to process 'Digest' type HTTP Authorization headers. A remote user can send a specially crafted request to view potentially sensitive information from the previous request.

Robert Swiecki reported this vulnerability.

Impact:   A remote user can cause the target service to crash.

A remote user can obtain potentially sensitive information on the target system.

Solution:   The vendor has issued a fix (2.2.34, 2.4.27).

The vendor advisory is available at:

http://httpd.apache.org/security/vulnerabilities_24.html

Vendor URL:  httpd.apache.org/ (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jul 27 2017 (Ubuntu Issues Fix) Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, and 17.04.
Aug 1 2017 (Ubuntu Issues Fix) Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
Ubuntu has issued a fix for Ubuntu Linux 12.04 ESM.
Aug 15 2017 (Red Hat Issues Fix) Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Aug 15 2017 (Red Hat Issues Fix) Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Aug 16 2017 (Oracle Issues Fix for Oracle Linux) Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
Oracle has issued a fix for Oracle Linux 6.
Aug 17 2017 (Red Hat Issues Fix) Apache mod_auth_digest Uninitialized Memory Error Lets Remote Users Obtain Potentially Sensitive Information and Deny Service
Red Hat has issued a fix for httpd24-httpd for Red Hat Enterprise Linux 6, 6.7, 7, and 7.3.



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