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TITLE:
Ubuntu update for tcp-wrappers

SECUNIA ADVISORY ID:
SA26567

VERIFY ADVISORY:
http://secunia.com/advisories/26567/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

OPERATING SYSTEM:
Ubuntu Linux 7.04
http://secunia.com/product/14068/

DESCRIPTION:
Ubuntu has acknowledged a vulnerability in tcp-wrappers, which can be
exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to an error within the
"daemon_or_port_match()" function in host_access.c when handling
connections to services that have no server socket details specified
in the hosts.deny file. This can be exploited to connect to services
from locations which were intended to be blocked.

SOLUTION:
Apply updated packages.

-- Ubuntu 7.04 --

Source archives:

http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcp-wrappers_7.6.dbs-11ubuntu0.1.diff.gz
Size/MD5: 51563 a66ffe0947add0d626dc9d813298c931
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcp-wrappers_7.6.dbs-11ubuntu0.1.dsc
Size/MD5: 784 4430f26d95e93408a174206b2da912d2
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcp-wrappers_7.6.dbs.orig.tar.gz
Size/MD5: 99548 3a8f32fa7a030d84c7260578ffb46c29

amd64 architecture (Athlon64, Opteron, EM64T Xeon):

http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0-dev_7.6.dbs-11ubuntu0.1_amd64.deb
Size/MD5: 37234 297a97e32256bfd222a08b7a249fca50
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0_7.6.dbs-11ubuntu0.1_amd64.deb
Size/MD5: 30876 81ab1ff3bc887cba421857b92599f064
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcpd_7.6.dbs-11ubuntu0.1_amd64.deb
Size/MD5: 80144 c502d7ca97203abef9d8468ae14a2751

i386 architecture (x86 compatible Intel/AMD):

http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0-dev_7.6.dbs-11ubuntu0.1_i386.deb
Size/MD5: 34432 64f1a0e9d0dc0dd2eae5af32d35e8a2b
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0_7.6.dbs-11ubuntu0.1_i386.deb
Size/MD5: 29374 31f7af2847ae763f268c0f3a4c683335
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcpd_7.6.dbs-11ubuntu0.1_i386.deb
Size/MD5: 78086 8ee708787754927c56bed98631cc739c

powerpc architecture (Apple Macintosh G3/G4/G5):

http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0-dev_7.6.dbs-11ubuntu0.1_powerpc.deb
Size/MD5: 37028 62d8517de1af829ebd5baf0cc39d2cbb
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0_7.6.dbs-11ubuntu0.1_powerpc.deb
Size/MD5: 32804 0cc1db9a4c4f5577a99e887d8094c86a
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcpd_7.6.dbs-11ubuntu0.1_powerpc.deb
Size/MD5: 87362 54d419fa50c66cad5c04ad2ca3ed4163

sparc architecture (Sun SPARC/UltraSPARC):

http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0-dev_7.6.dbs-11ubuntu0.1_sparc.deb
Size/MD5: 35094 e400ccb9a4c8f78c1e451d5a3602958f
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/libwrap0_7.6.dbs-11ubuntu0.1_sparc.deb
Size/MD5: 28856 abe647adb76cba044f17786e028da758
http://security.ubuntu.com/ubuntu/pool/main/t/tcp-wrappers/tcpd_7.6.dbs-11ubuntu0.1_sparc.deb
Size/MD5: 79062 e6e97f4e4e585dfaef10f08a1608952b

PROVIDED AND/OR DISCOVERED BY:
Reported by Jamin W. Collins in the Debian libwrap package and Maxime
ritter in the Ubuntu tcp-wrappers package.

ORIGINAL ADVISORY:
http://www.ubuntu.com/usn/usn-507-1

OTHER REFERENCES:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=405342

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