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Home » Hacking News » SuSE-SA:2002:047-OpenLDAP2

SuSE-SA:2002:047-OpenLDAP2

by Nikola Strahija on December 6th, 2002 Affected products: 7.1, 7.2, 7.3, 8.0, SuSE eMail Server III, 3.1, SuSE Linux Connectivity Server, SuSE Linux Enterprise Server 7, SuSE Linux Office Server


Content of this advisory:
1) security vulnerability resolved: Buffer overflows in openldap2.
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- traceroute-nanog
- gnuplot
3) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion, solution, upgrade information

OpenLDAP is the Open Source implementation of the Lightweight Directory
Access Protocol (LDAP) and is used in network environments for distributing
certain information such as X.509 certificates or login information.

The SuSE Security Team reviewed critical parts of that package and found
several buffer overflows and other bugs remote attackers could exploit
to gain access on systems running vulnerable LDAP servers.
In addition to these bugs, various local exploitable bugs within the
OpenLDAP2 libraries (openldap2-devel package) have been fixed.

Since there is no workaround possible except shutting down the LDAP server,
we strongly recommend an update.

Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Then, install the package using the command "rpm -Fhv file.rpm" to apply
the update.
Our maintenance customers are being notified individually. The packages
are being offered to install from the maintenance web.

To be sure the update takes effect you have to restart the LDAP server
by executing the following command as root:

/etc/rc.d/ldap restart


i386 Intel Platform:

SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/openldap2-2.0.23-143.i386.rpm
0facbec09078e1a849b629a335d25dcf
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/openldap2-devel-2.0.23-143.i386.rpm
90b2aff137bd510930835b7a7cb7bc1e
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/openldap2-2.0.23-143.i386.patch.rpm
aac122b6dda874c97d2e3f8e43a33897
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n4/openldap2-devel-2.0.23-143.i386.patch.rpm
e032d25cd37167b956a41b45e7c1bc60
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/openldap2-2.0.23-143.src.rpm
773c24a1654055b692dbfe6c1ce436f2

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/openldap2-2.0.12-44.i386.rpm
0c3078060330559ae49d67cdb0def908
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/openldap2-devel-2.0.12-44.i386.rpm
4d09ba68655344abc273f7cb67fee482
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/openldap2-2.0.12-44.src.rpm
58706b1104fec0d6a6533e5f6decb8cd


SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/openldap2-2.0.11-67.i386.rpm
28f575d89d8fbb9c269b158d12b599a6
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/openldap2-devel-2.0.11-67.i386.rpm
7edf8a034f6de9ec15fd0d0e683e25e3
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/openldap2-2.0.11-67.src.rpm
1aac2bc81f82065513845a0e923433bf

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/openldap2-2.0.11-66.i386.rpm
901b6452a24470b5cf39223e4b4a611d
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/openldap2-2.0.11-66.src.rpm
d5d0a0a397f919b2f5d644c517dd56a5


Sparc Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/openldap2-2.0.12-27.sparc.rpm
4639159e2de3a53115b4a7a918a79864
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/openldap2-devel-2.0.12-27.sparc.rpm
609773f10ce2ea8953f4fc8772f4af23
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/openldap2-2.0.12-27.src.rpm
70758c3e7c36f10a53980eaeb6bddea3

AXP Alpha Platform:

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/openldap2-2.0.11-30.alpha.rpm
3d6bf0861070044c54ed52e8777192b6
source rpm(s):
ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/openldap2-2.0.11-30.src.rpm
3e0867844268b399d6ac2b9788d017f4


PPC Power PC Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/openldap2-2.0.12-54.ppc.rpm
fa2268bf1629c69db048371b67a1e177
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/openldap2-devel-2.0.12-54.ppc.rpm
e5f6ea2f05c6f5904834e8083ef8502b
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/openldap2-2.0.12-54.src.rpm
5c88d479f0f54b6b933f11a63e8d0c42

SuSE-7.1:
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/openldap2-2.0.11-27.ppc.rpm
b6630f01be5e342cba2167a1f69583bf
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/openldap2-2.0.11-27.src.rpm
5664341323793814db38b162d4cf07dc

______________________________________________________________________________

2) Pending vulnerabilities in SuSE Distributions and Workarounds:

- traceroute-nanog
Due to recent postings on [email protected] new
traceroute-nanog packages are currently being built and
will be released as soon as possible.

- gnuplot
An error in a patch for french documentation added by SuSE leads to a
buffer overflow in gnuplot that can be exploited to gain root
privileges by a local attacker. gnuplot is installed setuid root on
SuSE Linux before (excluding) 8.0 to be able to display graphics with
the SVGA library. We have provided update packages at the usual
location that fix the vulnerability.

______________________________________________________________________________

3) standard appendix: authenticity verification, additional information

- Package authenticity verification:

SuSE update packages are available on many mirror ftp servers all over
the world. While this service is being considered valuable and important
to the free and open source software community, many users wish to be
sure about the origin of the package and its content before installing
the package. There are two verification methods that can be used
independently from each other to prove the authenticity of a downloaded
file or rpm package:
1) md5sums as provided in the (cryptographically signed) announcement.
2) using the internal gpg signatures of the rpm package.

1) execute the command
md5sum
after you downloaded the file from a SuSE ftp server or its mirrors.
Then, compare the resulting md5sum with the one that is listed in the
announcement. Since the announcement containing the checksums is
cryptographically signed (usually using the key [email protected]),
the checksums show proof of the authenticity of the package.
We disrecommend to subscribe to security lists which cause the
email message containing the announcement to be modified so that
the signature does not match after transport through the mailing
list software.
Downsides: You must be able to verify the authenticity of the
announcement in the first place. If RPM packages are being rebuilt
and a new version of a package is published on the ftp server, all
md5 sums for the files are useless.

2) rpm package signatures provide an easy way to verify the authenticity
of an rpm package. Use the command
rpm -v --checksig
to verify the signature of the package, where is the
filename of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an un-installed rpm
package file.
Prerequisites:
a) gpg is installed
b) The package is signed using a certain key. The public part of this
key must be installed by the gpg program in the directory
~/.gnupg/ under the user's home directory who performs the
signature verification (usually root). You can import the key
that is used by SuSE in rpm packages for SuSE Linux by saving
this announcement to a file ("announcement.txt") and
running the command (do "su -" to be root):
gpg --batch; gpg < announcement.txt | gpg --import
SuSE Linux distributions version 7.1 and thereafter install the
key "[email protected]" upon installation or upgrade, provided that
the package gpg is installed. The file containing the public key
is placed at the top-level directory of the first CD (pubring.gpg)
and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .


- SuSE runs two security mailing lists to which any interested party may
subscribe:

[email protected]
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
.

[email protected]
- SuSE's announce-only mailing list.
Only SuSE's security announcements are sent to this list.
To subscribe, send an email to
.

For general information or the frequently asked questions (faq)
send mail to:
or
respectively.


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