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Category:   Application (Generic)  >   Squid Vendors:   [Multiple Authors/Vendors]
(Mandrake Issues Fix) Squid Proxy Caching Server Can Be Crashed by Remote Users with Mkdir PUT Requests
SecurityTracker Alert ID:  1002794
SecurityTracker URL:  http://securitytracker.com/id/1002794
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Nov 22 2001
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.3 and 2.4 series
Description:   A denial of service vulnerability was reported in the Squid proxy caching server. A remote user can cause the proxy caching service to crash.

The following type of request that requires a directory to be created will cause the Squid proxy to crash:

PUT ftp://cgi-lexus:yGDgX9@[ftpserveraddress]/WEB-INF/1/2/1/ HTTP/1.1

The following log messages will be created as a result of this type of command:

Sep 10 14:17:11 azimuth (squid): xstrdup: tried to dup a NULL pointer!
Sep 10 14:17:11 azimuth squid[3027]: Squid Parent: child process 12742 exited due to signal 6
Sep 10 14:17:14 azimuth squid[3027]: Squid Parent: child process 12745 started

It is reported that the process will reload within a few seconds and return to normal operation.

Impact:   A remote user can cause the Squid proxy to crash.
Solution:   The vendor has released a fix:

Linux-Mandrake 7.1:
f51abc9cbfd388422ad429acb2e18fd8 7.1/RPMS/squid-2.3.STABLE5-2.3mdk.i586.rpm
a559c9f371a28e4b5d737b3ff6593bda 7.1/SRPMS/squid-2.3.STABLE5-2.3mdk.src.rpm

Linux-Mandrake 7.2:
e36cc02064b0273ed02d82c7d4cfc1f9 7.2/RPMS/squid-2.3.STABLE5-2.2mdk.i586.rpm
463d7ea1054b280d715b8ac34b6dbdc4 7.2/SRPMS/squid-2.3.STABLE5-2.2mdk.src.rpm

Mandrake Linux 8.0:
d58e59c5f053b42fc9f437bad511a2ca 8.0/RPMS/squid-2.3.STABLE5-2.1mdk.i586.rpm
8afd5c63a7f376696ff83ce8aa5c0c50 8.0/SRPMS/squid-2.3.STABLE5-2.1mdk.src.rpm

Mandrake Linux 8.0 (PPC):
fc66b1e213aaf4a94488538c6690893c ppc/8.0/RPMS/squid-2.3.STABLE5-2.1mdk.ppc.rpm
8afd5c63a7f376696ff83ce8aa5c0c50 ppc/8.0/SRPMS/squid-2.3.STABLE5-2.1mdk.src.rpm

Mandrake Linux 8.1:
34571f8aa96a8f379afee5a71c5fc015 8.1/RPMS/squid-2.4.STABLE1-8.1mdk.i586.rpm
01d5894484804f9c9606bf4f9fcf5c13 8.1/SRPMS/squid-2.4.STABLE1-8.1mdk.src.rpm

Corporate Server 1.0.1:
f51abc9cbfd388422ad429acb2e18fd8 1.0.1/RPMS/squid-2.3.STABLE5-2.3mdk.i586.rpm
a559c9f371a28e4b5d737b3ff6593bda 1.0.1/SRPMS/squid-2.3.STABLE5-2.3mdk.src.rpm

Single Network Firewall 7.2:
0fa2290476c1fe1affc773753fb7609d snf7.2/RPMS/squid-2.3.STABLE5-2.4mdk.i586.rpm
e34f0c102ebf3a607143fe67ca47618b snf7.2/SRPMS/squid-2.3.STABLE5-2.4mdk.src.rpm

To upgrade automatically, use MandrakeUpdate.

If you want to upgrade manually, download the updated package from one of the Mandrake FTP server mirrors and upgrade with "rpm -Fvh *.rpm". A list of mirror sites is available at:

http://www.linux-mandrake.com/en/ftp.php3.

Updated packages are available in the "updates/[ver]/RPMS/" directory. For example, if you are looking for an updated RPM package for Mandrake Linux 8.0, look for it in "updates/8.0/RPMS/". Updated source RPMs are available as well, but you generally do not need to download them.

Vendor URL:  www.squid-cache.org/bugs/show_bug.cgi?id=233 (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Linux (Mandriva/Mandrake)
Underlying OS Comments:  Mandrake 7.1, 7.2, 8.0, 8.1, Corporate Server 1.0.1, Single Network Firewall 7.2

Message History:   This archive entry is a follow-up to the message listed below.
Sep 21 2001 Squid Proxy Caching Server Can Be Crashed by Remote Users with Mkdir PUT Requests



 Source Message Contents

Subject:  [Security Announce] MDKSA-2001:088 - squid update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

________________________________________________________________________

                Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           squid
Date:                   November 21st, 2001
Advisory ID:            MDKSA-2001:088

Affected versions:      7.1, 7.2, 8.0, 8.1, Corporate Server 1.0.1, 
                        Single Network Firewall 7.2
________________________________________________________________________

Problem Description:

 Vladimir Ivaschenko found a problem in the squid proxy server.  Certain
 FTP requests could cause the squid daemon to abort, making it
 unavailable for a few seconds.  If enough of these requests are sent in
 a short period of time, the squid daemon will not restart itself.
________________________________________________________________________

References:

  http://www.squid-cache.org/bugs/show_bug.cgi?id=233
________________________________________________________________________

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:
  rpm --checksig package.rpm
You can get the GPG public key of the Mandrake Linux Security Team at
  http://www.linux-mandrake.com/en/security/RPM-GPG-KEYS
If you use MandrakeUpdate, the verification of md5 checksum and GPG
signature is performed automatically for you.

Linux-Mandrake 7.1:
f51abc9cbfd388422ad429acb2e18fd8  7.1/RPMS/squid-2.3.STABLE5-2.3mdk.i586.rpm
a559c9f371a28e4b5d737b3ff6593bda  7.1/SRPMS/squid-2.3.STABLE5-2.3mdk.src.rpm

Linux-Mandrake 7.2:
e36cc02064b0273ed02d82c7d4cfc1f9  7.2/RPMS/squid-2.3.STABLE5-2.2mdk.i586.rpm
463d7ea1054b280d715b8ac34b6dbdc4  7.2/SRPMS/squid-2.3.STABLE5-2.2mdk.src.rpm

Mandrake Linux 8.0:
d58e59c5f053b42fc9f437bad511a2ca  8.0/RPMS/squid-2.3.STABLE5-2.1mdk.i586.rpm
8afd5c63a7f376696ff83ce8aa5c0c50  8.0/SRPMS/squid-2.3.STABLE5-2.1mdk.src.rpm

Mandrake Linux 8.0 (PPC):
fc66b1e213aaf4a94488538c6690893c  ppc/8.0/RPMS/squid-2.3.STABLE5-2.1mdk.ppc.rpm
8afd5c63a7f376696ff83ce8aa5c0c50  ppc/8.0/SRPMS/squid-2.3.STABLE5-2.1mdk.src.rpm

Mandrake Linux 8.1:
34571f8aa96a8f379afee5a71c5fc015  8.1/RPMS/squid-2.4.STABLE1-8.1mdk.i586.rpm
01d5894484804f9c9606bf4f9fcf5c13  8.1/SRPMS/squid-2.4.STABLE1-8.1mdk.src.rpm

Corporate Server 1.0.1:
f51abc9cbfd388422ad429acb2e18fd8  1.0.1/RPMS/squid-2.3.STABLE5-2.3mdk.i586.rpm
a559c9f371a28e4b5d737b3ff6593bda  1.0.1/SRPMS/squid-2.3.STABLE5-2.3mdk.src.rpm

Single Network Firewall 7.2:
0fa2290476c1fe1affc773753fb7609d  snf7.2/RPMS/squid-2.3.STABLE5-2.4mdk.i586.rpm
e34f0c102ebf3a607143fe67ca47618b  snf7.2/SRPMS/squid-2.3.STABLE5-2.4mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):

________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".

You can download the updates directly from one of the mirror sites
listed at:

  http://www.linux-mandrake.com/en/ftp.php3.

Updated packages are available in the "updates/[ver]/RPMS/" directory.
For example, if you are looking for an updated RPM package for
Mandrake Linux 8.0, look for it in "updates/8.0/RPMS/".  Updated source
RPMs are available as well, but you generally do not need to download
them.

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

You can view other security advisories for Mandrake Linux at:

  http://www.linux-mandrake.com/en/security/

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
________________________________________________________________________

Mandrake Linux has two security-related mailing list services that
anyone can subscribe to:

security-announce@linux-mandrake.com

  Mandrake Linux's security announcements mailing list.  Only
  announcements are sent to this list and it is read-only.

security-discuss@linux-mandrake.com

  Mandrake Linux's security discussion mailing list.  This list is open
  to anyone to discuss Mandrake Linux security specifically and Linux
  security in general.

To subscribe to either list, send a message to
  sympa@linux-mandrake.com
with "subscribe [listname]" in the body of the message.

To remove yourself from either list, send a message to
  sympa@linux-mandrake.com
with "unsubscribe [listname]" in the body of the message.

To get more information on either list, send a message to
  sympa@linux-mandrake.com
with "info [listname]" in the body of the message.

Optionally, you can use the web interface to subscribe to or unsubscribe
from either list:

  http://www.linux-mandrake.com/en/flists.php3#security
________________________________________________________________________

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security@linux-mandrake.com>


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