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OpenServer 5.0.6 OpenServer 5.0.7 : squid %-encoded characters in a URL
From: please_reply_to_security () sco com
Date: Tue, 31 Aug 2004 13:10:39 -0700 (PDT)

Hash: SHA1


                        SCO Security Advisory

Subject:                OpenServer 5.0.6 OpenServer 5.0.7 : squid %-encoded characters in a URL
Advisory number:        SCOSA-2004.13
Issue date:             2004 August 31
Cross reference:        sr890342 fz529456 erg712609 CAN-2004-0189

1. Problem Description

        The "%xx" URL decoding function in Squid 2.5STABLE4 and
        earlier allows remote attackers to bypass url_regex ACLs
        via a URL with a NULL ("%00") character, which causes Squid
        to use only a portion of the requested URL when comparing
        it against the access control lists. 

        The Common Vulnerabilities and Exposures project (cve.mitre.org) 
        has assigned the name CAN-2004-0189 to this issue.

2. Vulnerable Supported Versions

        System                          Binaries
        OpenServer 5.0.6                Squid distribution < 2.5.STABLE5
        OpenServer 5.0.7                Squid distribution < 2.5.STABLE5

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

        See ftp://ftp.sco.com/pub/openserver5/oss646c/oss646c.txt

        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

        See ftp://ftp.sco.com/pub/openserver5/opensrc/xorg-6.7.0Ba/xorg67_rn.txt

        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

        See ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.10/SCOSA-2004.10.txt

        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

        See ftp://ftp.sco.com/pub/openserver5/opensrc/perl-5.8.4Aa/perl584_rn.txt

        4.17 Location of Squid Fixed Binaries


        4.18 Verification

        MD5 (VOL.000.000) = 656d0097b861d9e2375f672579e15c6b
        MD5 (VOL.000.001) = 4f15cb68083fb6ceff3dd3c72aed41a2
        MD5 (VOL.000.002) = 6fbf1b23e9d86f621de916bca4e476b3
        MD5 (VOL.000.003) = fefcfc2f2d4f56e8be34d917a882bd41

        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

        Supplement CD 3


        5.2 Verification

        MD5 (osr507suppcd3.iso) = 129229594bd3a020db429e7de8b95def

        md5 is available for download from

        5.3 Installing Fixed Binaries

        See the Supplement CD 3 Release Notes


6. References

        Specific references for this advisory:

        SCO security resources:

        SCO security advisories via email

        This security fix closes SCO incidents sr890342 fz529456

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)


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