OpenServer 5.0.6 OpenServer 5.0.7 : squid %-encoded characters in a URL
Date: 08/31/04

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    Date: Tue, 31 Aug 2004 13:10:39 -0700 (PDT)

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                            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 (
            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


            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 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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