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Mandrake: squid Access control escape vulnerability Print E-mail
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Posted by LinuxSecurity.com Team   
Mandrake It is possible for a remote attacker to create URLs that would not be properly tested against squid's ACLs, and thus be automatically allowed.

Mandrakelinux Security Update Advisory
 _______________________________________________________________________

 Package name:           squid
 Advisory ID:            MDKSA-2004:025
 Date:                   March 30th, 2004

 Affected versions:	 9.1, 9.2, 10.0, Corporate Server 2.1,
			 Multi Network Firewall 8.2
 ______________________________________________________________________

 Problem Description:

 A vulnerability was discovered in squid version 2.5.STABLE4 and
 earlier with the processing of %-encoded characters in a URL.  If a
 squid configuration uses ACLs (Access Control Lists), it is possible
 for a remote attacker to create URLs that would not be properly tested
 against squid's ACLs, potentially allowing clients to access URLs that
 would otherwise be disallowed.
 
 As well, the provided packages for Mandrake Linux 9.2 and 9.1 include a
 new Access Control type called "urllogin" which can be used to protect
 vulnerable Microsoft Internet Explorer clients from accessing URLs that
 contain login information.  While this Access Control type is available,
 it is not used in the default configuration.
 
 The updated packages are patched to protect against these
 vulnerabilities.
 _______________________________________________________________________

 References:

   http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0189
   http://www.squid-cache.org/Advisories/SQUID-2004_1.txt
   http://www.microsoft.com/security/incident/spoof.asp
 ______________________________________________________________________

 Updated Packages:
  
 Corporate Server 2.1:
 4fd20ca8507ea60149bd4795fed01f1a  corporate/2.1/RPMS/squid-2.4.STABLE7-2.1.C21mdk.i586.rpm
 5d800fb0ebf900f60ef1ba1eccb07642  corporate/2.1/SRPMS/squid-2.4.STABLE7-2.1.C21mdk.src.rpm

 Corporate Server 2.1/x86_64:
 b28afa1eee2601d93919ab9b87c88cc1  x86_64/corporate/2.1/RPMS/squid-2.4.STABLE7-2.1.C21mdk.x86_64.rpm
 5d800fb0ebf900f60ef1ba1eccb07642  x86_64/corporate/2.1/SRPMS/squid-2.4.STABLE7-2.1.C21mdk.src.rpm

 Mandrakelinux 9.1:
 97f8a5010fcd34e2017cdddeca1871a8  9.1/RPMS/squid-2.5.STABLE1-7.1.91mdk.i586.rpm
 77830b2c1f4b08013cf6ca3d90687927  9.1/SRPMS/squid-2.5.STABLE1-7.1.91mdk.src.rpm

 Mandrakelinux 9.1/PPC:
 123e83676d55a1c465040db5f1e688d4  ppc/9.1/RPMS/squid-2.5.STABLE1-7.1.91mdk.ppc.rpm
 77830b2c1f4b08013cf6ca3d90687927  ppc/9.1/SRPMS/squid-2.5.STABLE1-7.1.91mdk.src.rpm

 Mandrakelinux 9.2:
 16fa9ee0eed04bcd4e23aab9864adc10  9.2/RPMS/squid-2.5.STABLE3-3.1.92mdk.i586.rpm
 9671d4f57c43ca371bb9437b5480bfe1  9.2/SRPMS/squid-2.5.STABLE3-3.1.92mdk.src.rpm

 Mandrakelinux 9.2/AMD64:
 6d9c8708456e3e581a2d0e4006073d9a  amd64/9.2/RPMS/squid-2.5.STABLE3-3.1.92mdk.amd64.rpm
 9671d4f57c43ca371bb9437b5480bfe1  amd64/9.2/SRPMS/squid-2.5.STABLE3-3.1.92mdk.src.rpm

 Mandrakelinux 10.0:
 a72b8ebf3da3d8435693301312fa475e  10.0/RPMS/squid-2.5.STABLE4-1.100mdk.i586.rpm
 6c2930b14c1c18228159f78a9892eb65  10.0/SRPMS/squid-2.5.STABLE4-1.100mdk.src.rpm

 Multi Network Firewall 8.2:
 7bb35a615f5e95270f2514bd19ddf69d  mnf8.2/RPMS/squid-2.4.STABLE7-1.2.M82mdk.i586.rpm
 7a590e5539a260dc6dc468c12c7f641d  mnf8.2/SRPMS/squid-2.4.STABLE7-1.2.M82mdk.src.rpm
 _______________________________________________________________________

 To upgrade automatically use MandrakeUpdate or urpmi.  The verification
 of md5 checksums and GPG signatures is performed automatically for you.

 A list of FTP mirrors can be obtained from:

   http://www.mandrakesecure.net/en/ftp.php

 All packages are signed by Mandrakesoft for security.  You can obtain
 the GPG public key of the Mandrakelinux Security Team by executing:

  gpg --recv-keys --keyserver www.mandrakesecure.net 0x22458A98

 Please be aware that sometimes it takes the mirrors a few hours to
 update.

 You can view other update advisories for Mandrakelinux at:

   http://www.mandrakesecure.net/en/advisories/

 Mandrakesoft has several security-related mailing list services that
 anyone can subscribe to.  Information on these lists can be obtained by
 visiting:

   http://www.mandrakesecure.net/en/mlist.php

 If you want to report vulnerabilities, please contact

  security_linux-mandrake.com

 Type Bits/KeyID     Date       User ID
 pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  

 
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