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Category:   Application (Generic)  >   Squid Vendors:   Squid-cache.org
(Debian Issues Fix) Squid Proxy xstrdup() Can Be Crashed With Malformed DNS Responses
SecurityTracker Alert ID:  1013274
SecurityTracker URL:  http://securitytracker.com/id/1013274
CVE Reference:   CVE-2005-0446   (Links to External Site)
Date:  Feb 23 2005
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.5.STABLE5 - 2.5.STABLE8
Description:   A vulnerability was reported in Squid. A remote DNS server may be able to cause the proxy to crash.

A remote DNS server can send certain "odd" DNS responses to a target proxy to cause an assertion failure on the target proxy process. The target Squid process may crash with the following type of error message:

xstrndup: Assertion 'n' failed

Other error messages may be observed.

The flaw resides in 'squid/src/fqdncache.c'.

Impact:   A remote DNS server can cause the target proxy to crash.
Solution:   Debian has released a fix.

Debian GNU/Linux 3.0 alias woody:

Source archives:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7.dsc
Size/MD5 checksum: 612 bc9dc33a502eb9e0b4293c9a0e2aef18
http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7.diff.gz
Size/MD5 checksum: 236440 d1c8a57810656ee89295c82054824f8e
http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6.orig.tar.gz
Size/MD5 checksum: 1081920 59ce2c58da189626d77e27b9702ca228

Alpha architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_alpha.deb
Size/MD5 checksum: 815502 5baa03bdbc5258c31a9c093fd567084c
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_alpha.deb
Size/MD5 checksum: 75622 5cfae27e8324a0ca0dfccb3dfbadcb1a
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_alpha.deb
Size/MD5 checksum: 60366 fde4ec72c5629fe0d7f38b873c27e620

ARM architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_arm.deb
Size/MD5 checksum: 726008 61adcf77023bbaa37db5e9161acf4050
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_arm.deb
Size/MD5 checksum: 73382 5f3e398939e6a277ea015f9f3235eff1
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_arm.deb
Size/MD5 checksum: 58704 ad58694d9fb083e67809a98f71187dad

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_i386.deb
Size/MD5 checksum: 684338 577c9a8008c5ede1a4f16ef8520ed4c7
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_i386.deb
Size/MD5 checksum: 73884 203f95f882aa4ea3ba68076fdcf94cfe
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_i386.deb
Size/MD5 checksum: 58396 28dc7b3ad6406d51bf932600b85ece0b

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_ia64.deb
Size/MD5 checksum: 953954 d79a494213f89d9c021273c55fa14490
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_ia64.deb
Size/MD5 checksum: 79476 b227a17db6a5f115d99598210ed5d5f3
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_ia64.deb
Size/MD5 checksum: 63034 23204a45be54339b31e04e9358e357c6

HP Precision architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_hppa.deb
Size/MD5 checksum: 779584 c37982b618205e53554cdbdedfed1729
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_hppa.deb
Size/MD5 checksum: 74828 d1f1807974aa091d258dda40f1a5e27a
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_hppa.deb
Size/MD5 checksum: 59842 38372550333e90fba53558ab8ed9eebc

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_m68k.deb
Size/MD5 checksum: 666248 649f02e2b065d64a7059c08b3aa38bfc
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_m68k.deb
Size/MD5 checksum: 72730 cbbc04070becff9dbf07f8816a33a13c
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_m68k.deb
Size/MD5 checksum: 57938 c0410320db936951124d49f799e77057

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_mips.deb
Size/MD5 checksum: 765390 4f877c9010ee2ef13ba96b7105e3e19a
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_mips.deb
Size/MD5 checksum: 74354 9b425951580d0d782cf0622003673fba
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_mips.deb
Size/MD5 checksum: 58992 dd15f0bd3279f7012024121d60ecaeed

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_mipsel.deb
Size/MD5 checksum: 765608 2e798cbf5b623b7c2bf06a13aebbefc0
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_mipsel.deb
Size/MD5 checksum: 74478 6b9d563241173ef6f9baa4a0c6d73a69
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_mipsel.deb
Size/MD5 checksum: 59102 833e1a5808ff69aa664fd055d713a03c

PowerPC architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_powerpc.deb
Size/MD5 checksum: 722756 32ce8c5e69389b970843ed0b82691894
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_powerpc.deb
Size/MD5 checksum: 73378 2661e53c7a134e96d8da81a3c3284bd1
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_powerpc.deb
Size/MD5 checksum: 58586 c8d689cd3c7c09b9d119ab2c502f7d39

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_s390.deb
Size/MD5 checksum: 712300 40f6212bc20c134923cf1048cfd5245b
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_s390.deb
Size/MD5 checksum: 73728 e696e11731b0ffe2a00d883bdc3d16cd
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_s390.deb
Size/MD5 checksum: 59156 653037fec730df2155e51aa4d2809ee3

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_sparc.deb
Size/MD5 checksum: 724706 3339a3b62ec6e672725c20f012759b4b
http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_sparc.deb
Size/MD5 checksum: 76012 cda6d662b54f46a831d8566f6f8f095b
http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_sparc.deb
Size/MD5 checksum: 61020 36640727d0e8c5e400de0c04630c961b

Vendor URL:  www.squid-cache.org/ (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Linux (Debian)
Underlying OS Comments:  3.0

Message History:   This archive entry is a follow-up to the message listed below.
Feb 14 2005 Squid Proxy xstrdup() Can Be Crashed With Malformed DNS Responses



 Source Message Contents

Subject:  [SECURITY] [DSA 688-1] New squid packages fix denial of service


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

- --------------------------------------------------------------------------
Debian Security Advisory DSA 688-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
February 23rd, 2005                     http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : squid
Vulnerability  : mising input sanitising
Problem-Type   : remote
Debian-specific: no
CVE ID         : CAN-2005-0446

Upstream developers have discovered several problems in squid, the
Internet object cache, the popular WWW proxy cache.  A remote attacker
can cause squid to crash via certain DNS responses.

For the stable distribution (woody) these problems have been fixed in
version 2.4.6-2woody7.

For the unstable distribution (sid) these problems have been fixed in
version 2.5.8-3.

We recommend that you upgrade your squid package.


Upgrade Instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7.dsc
      Size/MD5 checksum:      612 bc9dc33a502eb9e0b4293c9a0e2aef18
    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7.diff.gz
      Size/MD5 checksum:   236440 d1c8a57810656ee89295c82054824f8e
    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6.orig.tar.gz
      Size/MD5 checksum:  1081920 59ce2c58da189626d77e27b9702ca228

  Alpha architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_alpha.deb
      Size/MD5 checksum:   815502 5baa03bdbc5258c31a9c093fd567084c
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_alpha.deb
      Size/MD5 checksum:    75622 5cfae27e8324a0ca0dfccb3dfbadcb1a
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_alpha.deb
      Size/MD5 checksum:    60366 fde4ec72c5629fe0d7f38b873c27e620

  ARM architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_arm.deb
      Size/MD5 checksum:   726008 61adcf77023bbaa37db5e9161acf4050
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_arm.deb
      Size/MD5 checksum:    73382 5f3e398939e6a277ea015f9f3235eff1
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_arm.deb
      Size/MD5 checksum:    58704 ad58694d9fb083e67809a98f71187dad

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_i386.deb
      Size/MD5 checksum:   684338 577c9a8008c5ede1a4f16ef8520ed4c7
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_i386.deb
      Size/MD5 checksum:    73884 203f95f882aa4ea3ba68076fdcf94cfe
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_i386.deb
      Size/MD5 checksum:    58396 28dc7b3ad6406d51bf932600b85ece0b

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_ia64.deb
      Size/MD5 checksum:   953954 d79a494213f89d9c021273c55fa14490
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_ia64.deb
      Size/MD5 checksum:    79476 b227a17db6a5f115d99598210ed5d5f3
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_ia64.deb
      Size/MD5 checksum:    63034 23204a45be54339b31e04e9358e357c6

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_hppa.deb
      Size/MD5 checksum:   779584 c37982b618205e53554cdbdedfed1729
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_hppa.deb
      Size/MD5 checksum:    74828 d1f1807974aa091d258dda40f1a5e27a
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_hppa.deb
      Size/MD5 checksum:    59842 38372550333e90fba53558ab8ed9eebc

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_m68k.deb
      Size/MD5 checksum:   666248 649f02e2b065d64a7059c08b3aa38bfc
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_m68k.deb
      Size/MD5 checksum:    72730 cbbc04070becff9dbf07f8816a33a13c
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_m68k.deb
      Size/MD5 checksum:    57938 c0410320db936951124d49f799e77057

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_mips.deb
      Size/MD5 checksum:   765390 4f877c9010ee2ef13ba96b7105e3e19a
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_mips.deb
      Size/MD5 checksum:    74354 9b425951580d0d782cf0622003673fba
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_mips.deb
      Size/MD5 checksum:    58992 dd15f0bd3279f7012024121d60ecaeed

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_mipsel.deb
      Size/MD5 checksum:   765608 2e798cbf5b623b7c2bf06a13aebbefc0
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_mipsel.deb
      Size/MD5 checksum:    74478 6b9d563241173ef6f9baa4a0c6d73a69
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_mipsel.deb
      Size/MD5 checksum:    59102 833e1a5808ff69aa664fd055d713a03c

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_powerpc.deb
      Size/MD5 checksum:   722756 32ce8c5e69389b970843ed0b82691894
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_powerpc.deb
      Size/MD5 checksum:    73378 2661e53c7a134e96d8da81a3c3284bd1
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_powerpc.deb
      Size/MD5 checksum:    58586 c8d689cd3c7c09b9d119ab2c502f7d39

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_s390.deb
      Size/MD5 checksum:   712300 40f6212bc20c134923cf1048cfd5245b
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_s390.deb
      Size/MD5 checksum:    73728 e696e11731b0ffe2a00d883bdc3d16cd
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_s390.deb
      Size/MD5 checksum:    59156 653037fec730df2155e51aa4d2809ee3

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/s/squid/squid_2.4.6-2woody7_sparc.deb
      Size/MD5 checksum:   724706 3339a3b62ec6e672725c20f012759b4b
    http://security.debian.org/pool/updates/main/s/squid/squid-cgi_2.4.6-2woody7_sparc.deb
      Size/MD5 checksum:    76012 cda6d662b54f46a831d8566f6f8f095b
    http://security.debian.org/pool/updates/main/s/squid/squidclient_2.4.6-2woody7_sparc.deb
      Size/MD5 checksum:    61020 36640727d0e8c5e400de0c04630c961b


  These files will probably be moved into the stable distribution on
  its next update.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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