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Home » Hacking News » MDKSA-2002:075 - nss_ldap update

MDKSA-2002:075 - nss_ldap update

by Nikola Strahija on November 9th, 2002 A buffer overflow vulnerability exists in nss_ldap versions prior to 198. When nss_ldap is configured without a value for the "host" keyword, it attempts to configure itself using SRV records stored in DNS. nss_ldap does not check that the data returned by the DNS query will fit into an internal buffer, thus exposing it to an overflow.


A similar issue exists in versions of nss_ldap prior to 199 where
nss_ldap does not check that the data returned by the DNS query has not
been truncated by the resolver libraries to avoid a buffer overflow.
This can make nss_ldap attempt to parse more data than what is actually
available, making it vulnerable to a read buffer overflow.

Finally, a format string bug in the logging function of pam_ldap prior
to version 144 exist.

All users are recommended to upgrade to these updated packages. Note
that the nss_ldap packages for 7.2, 8.0, and Single Network Firewall
7.2 contain the pam_ldap modules.
________________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0825
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0374
http://www.kb.cert.org/vuls/id/738331
http://www.padl.com/Articles/PotentialBufferOverflowin.html
________________________________________________________________________

Updated Packages:

Linux-Mandrake 7.2:
cc7940dc14b61c6bb8a289242a415c39 7.2/RPMS/nss_ldap-202-1.2mdk.i586.rpm
fa83615155165f38c3a691767c4d5455 7.2/SRPMS/nss_ldap-202-1.2mdk.src.rpm

Mandrake Linux 8.0:
eb3adc4ce19d132339392c45a5f63a87 8.0/RPMS/nss_ldap-202-1.2mdk.i586.rpm
fa83615155165f38c3a691767c4d5455 8.0/SRPMS/nss_ldap-202-1.2mdk.src.rpm

Mandrake Linux 8.0/PPC:
9e06d1d1e8efcf2ab3e7646fb182edfe ppc/8.0/RPMS/nss_ldap-202-1.2mdk.ppc.rpm
fa83615155165f38c3a691767c4d5455 ppc/8.0/SRPMS/nss_ldap-202-1.2mdk.src.rpm

Mandrake Linux 8.1:
d0b134533498411ff84c23c445325d09 8.1/RPMS/nss_ldap-202-1.1mdk.i586.rpm
376bd2062e8fb2128008bc6075bae8d1 8.1/RPMS/pam_ldap-156-1.1mdk.i586.rpm
85ec640296bd1cb5808f9beb7db3a566 8.1/SRPMS/nss_ldap-202-1.1mdk.src.rpm

Mandrake Linux 8.1/IA64:
3e44766f48622b70a4de7b66b959a857 ia64/8.1/RPMS/nss_ldap-202-1.1mdk.ia64.rpm
f22145546bff2930131da1b2503692ce ia64/8.1/RPMS/pam_ldap-156-1.1mdk.ia64.rpm
85ec640296bd1cb5808f9beb7db3a566 ia64/8.1/SRPMS/nss_ldap-202-1.1mdk.src.rpm

Mandrake Linux 8.2:
77cdc3912443eadf59ca53284d0340e2 8.2/RPMS/nss_ldap-202-1.1mdk.i586.rpm
16b952b71669460c7c4b9441b37e2014 8.2/RPMS/pam_ldap-156-1.1mdk.i586.rpm
85ec640296bd1cb5808f9beb7db3a566 8.2/SRPMS/nss_ldap-202-1.1mdk.src.rpm

Mandrake Linux 8.2/PPC:
b5f7f6eab56f68ba432267dc2e84c206 ppc/8.2/RPMS/nss_ldap-202-1.1mdk.ppc.rpm
0b73c3aba3ab7bdd2548a69934fa79f0 ppc/8.2/RPMS/pam_ldap-156-1.1mdk.ppc.rpm
85ec640296bd1cb5808f9beb7db3a566 ppc/8.2/SRPMS/nss_ldap-202-1.1mdk.src.rpm

Mandrake Linux 9.0:
da577902f504bf8f345446635fcc3cf7 9.0/RPMS/nss_ldap-202-1.1mdk.i586.rpm
b70c25f7b8a3b5f86149dd199003a4ff 9.0/RPMS/pam_ldap-156-1.1mdk.i586.rpm
85ec640296bd1cb5808f9beb7db3a566 9.0/SRPMS/nss_ldap-202-1.1mdk.src.rpm

Single Network Firewall 7.2:
cc7940dc14b61c6bb8a289242a415c39 snf7.2/RPMS/nss_ldap-202-1.2mdk.i586.rpm
fa83615155165f38c3a691767c4d5455 snf7.2/SRPMS/nss_ldap-202-1.2mdk.src.rpm
________________________________________________________________________

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

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

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

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

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package. You can do this with the command:

rpm --checksig

All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team from:

https://www.mandrakesecure.net/RPM-GPG-KEYS

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

You can view other update advisories for Mandrake Linux 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


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