Home    |    View Topics    |    Search    |    Contact Us    |   



Category:   Application (Web Server/CGI)  >   Apache mod_digest Vendors:   Apache Software Foundation
(SCO Issues Fix) Apache mod_digest May Validate Replayed Client Responses
SecurityTracker Alert ID:  1011130
SecurityTracker URL:
CVE Reference:   CVE-2003-0987   (Links to External Site)
Date:  Sep 1 2004
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.3.29 and prior versions
Description:   A vulnerability was reported in Apache mod_digest. The software may not correctly validate a client response, allowing a remote user to replay a response to gain access to an ostensibly protected system.

It is reported that mod_digest does not properly verify the nonce of a client response. A remote user may be able to replay a response to be authenticated in certain cases.

The report indicates that a remote user can capture the response from another section of the target web site (or another web site entirely). If the target user's username+password combination is the same and the realm is the same, the remote user can reportedly replay the digest response to be successfully authenticated.

Dirk-Willem van Gulik reported this flaw.

Impact:   A remote user may be able to be authenticated in certain cases.
Solution:   SCO has issued a fix, described at:

Vendor URL: (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Caldera/SCO)
Underlying OS Comments:  OpenServer 5.0.6, 5.0.7

Message History:   This archive entry is a follow-up to the message listed below.
Feb 3 2004 Apache mod_digest May Validate Replayed Client Responses

 Source Message Contents

Subject:  OpenServer 5.0.6 OpenServer 5.0.7 : apache mod_digest Incorrect Client Response Verification Vulnerability

Hash: SHA1


			SCO Security Advisory

Subject:		OpenServer 5.0.6 OpenServer 5.0.7 : apache mod_digest Incorrect Client Response Verification Vulnerability
Advisory number: 	SCOSA-2004.14
Issue date: 		2004 August 31
Cross reference:	sr889564 fz528952 erg712565 CAN-2003-0987

1. Problem Description

	Dirk-Willem van Gulik has reported a vulnerability in Apache
	mod_digest. mod_digest does not properly verify the nonce
	of a client response. A remote user may be able to replay
	a response to be authenticated in certain cases. 

	The Common Vulnerabilities and Exposures project ( 
	has assigned the name CAN-2003-0987 to this issue.

2. Vulnerable Supported Versions

	System				Binaries
	OpenServer 5.0.6 		Apache distribution < 1.3.31
	OpenServer 5.0.7		Apache distribution < 1.3.31

3. Solution

	The proper solution is to install the latest packages.

4. OpenServer 5.0.6

	4.1 First install oss646c or later

        4.2 Location of oss646c

        4.3 Verification of oss646c

        MD5 (VOL.000.000) = f19b6c6949f615316bfb075d249989e8
        MD5 (VOL.000.001) = 341ff8553aecd2c7b0c2beaf83030d0f
        MD5 (VOL.000.002) = 6e46708ad8029e12280d4f9ac60ab814
        MD5 (VOL.000.003) = 2868b64a6a6db742adb3b485be645d7e
        MD5 (VOL.000.004) = 1696fe1db9bb063827ee5e76e58dff84
        MD5 (VOL.000.005) = f39da342f8af72fcaccdf478dca04109
        MD5 (VOL.000.006) = 2b31611c8af7d2e7910d6e8e3cf701a6
        MD5 (VOL.000.007) = d0175c0f4e3ed29435b1eab95609f8f4
        MD5 (VOL.000.008) = aa9e8a525c341fed077f981b1dacb486
        MD5 (VOL.000.009) = 8e023af67b57507824406bdda322079a
        MD5 (VOL.000.010) = 2b46e8adba8ae0b64109f2069da978a2

	4.4 Installation of oss646c


	4.5 Next install xorg-6.7.0Ba or later

	4.6 Location of xorg-6.7.0Ba

	4.7 Verification of xorg-6.7.0Ba

	MD5 (VOL.000.000) = 289d1070c4135e4d25a20501dbca08d8
	MD5 (VOL.000.001) = 4111dadf961d4ef88e89112070f3e811
	MD5 (VOL.000.002) = 4c4cdf4bf4c28045b7b323cfa407829f
	MD5 (VOL.000.003) = d7e8da318d1c4df6fff14f60d993cf45
	MD5 (VOL.000.004) = bfc0571f1fededd1780fafa76db9be90

	4.8 Installation of xorg-6.7.0Ba


	4.9 Next install gwxlibs-1.3.3Db or later

	4.10 Location of gwxlibs-1.3.3Db

        4.11 Verification

        MD5 (VOL.000.000) = a85cf35c417903522392064aaa98f0a4
        MD5 (VOL.000.001) = d4383d6bc74bb6e873e7a4c8dfdc4e6b
        MD5 (VOL.000.002) = c5657b1358ef96177ae15fdcfec7132f
        MD5 (VOL.000.003) = 4c88ceb3502330b4c4d5e07ca7fc5214

	4.12 Installation of gwxlibs-1.3.3Db


	4.13 Next install perl-5.8.4Aa or later

	4.14 Location of perl-5.8.4Aa

	4.15 Verification

	MD5 (VOL.000.000) = b83b5e0ae513a1cb206baf37c4741653
	MD5 (VOL.000.001) = 1ab35276079e7661e38b72047cec488a
	MD5 (VOL.000.002) = 64a76371eae54e95d0b7e99be25f0a8a
	MD5 (VOL.000.003) = 724521beddc740ae4958fd63d1c45f3f
	MD5 (VOL.000.004) = f1d631477f16ce7b9512fbe60d9e3d0e

	4.16 Installation of perl-5.8.4Aa


	4.17 Location of Apache Fixed Binaries

	4.18 Verification

	MD5 (VOL.000.000) = d5bd96d1e0bc370411b1d8af5e6086df
	MD5 (VOL.000.001) = 8872c6c953ff3c88e62d29b31579e4bc
	MD5 (VOL.000.002) = 30d087a53be0b2746e55531c2659effd
	MD5 (VOL.000.003) = 9aef05c2b54317e9623756c19672d409
	MD5 (VOL.000.004) = c47b79c0b30b7ec1966c99fb41844dea
	MD5 (VOL.000.005) = 7883e1679beab406f829c469e36ceeda
	MD5 (VOL.000.006) = 388bfedf9d816d53ba868ab1555d94f9
	MD5 (VOL.000.007) = 2859384e5989f96c365e62bb52e7d22a
	MD5 (VOL.000.008) = d72b24bd144fbc575a22b055499dfdfc

	md5 is available for download from

	4.19 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	1) Download the VOL* files to a directory.

	2) Run the custom command, specify an install from media
	images, and specify the directory as the location of
	the images.

5. OpenServer 5.0.7

	5.1 Location of Fixed Binaries

	Maintenance Pack 3

	5.2 Verification

	MD5 (507mp3_vol.tar) = c927aefdd50b50aca5d29e08c1562aec

	md5 is available for download from

	5.3 Installing Fixed Binaries

	See the Maintenance Pack 3 Release Notes

6. References

	Specific references for this advisory:

	SCO security resources:

	SCO security advisories via email

	This security fix closes SCO incidents sr889564 fz528952

7. Disclaimer

	SCO is not responsible for the misuse of any of the information
	we provide on this website and/or through our security
	advisories. Our advisories are a service to our customers
	intended to promote secure installation and use of SCO


Version: GnuPG v1.2.4 (SCO/UNIX_SVR5)



Go to the Top of This SecurityTracker Archive Page

Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2020, LLC