Date: 29 October 1999
Click here for printable version
Click here for PGP verifiable version
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-1999.165 -- RHSA-1999:046-01
security problems with ypserv
29 October 1999
===========================================================================
Red Hat, Inc. has released the following advisory concerning security
problems and a buffer overflow with the ypserv package.
These vulnerabilities may be exploited by local administrators in the NIS
domain to inject password tables and by users to change some account
information of other users.
All Red Hat versions and platforms are affected by these vulnerabilities.
Red Hat have issued patches which correct these vulnerabilities.
- --------------------------BEGIN INCLUDED TEXT--------------------
- ---------------------------------------------------------------------
Red Hat, Inc. Security Advisory
Synopsis: security problems with ypserv
Advisory ID: RHSA-1999:046-01
Issue date: 1999-10-27
Updated on: 1999-10-27
Keywords:
Cross references: ypserv yppasswdd rpc.yppasswdd
- ---------------------------------------------------------------------
1. Topic:
The ypserv package, which contains the ypserv NIS server
and the yppasswdd password-change server, has been discovered
to have security holes.
2. Problem description:
With ypserv, local administrators in the NIS domain could
possibly inject password tables. In rpc.yppasswdd, users
could change GECOS and login shells of other users, and
there is a buffer overflow in the md5 hash generation.
It is recommended that all users of the ypserv package upgrade
to the new packages.
3. Bug IDs fixed (http://developer.redhat.com/bugzilla for more info):
4. Relevant releases/architectures:
Red Hat Linux 4.x, all architectures
Red Hat Linux 5.x, all architectures
Red Hat Linux 6.x, all architectures
5. Obsoleted by:
6. Conflicts with:
7. RPMs required:
Red Hat Linux 4.x:
Intel:
ftp://updates.redhat.com/4.2/i386/ypserv-1.3.9-0.4.2.i386.rpm
Alpha:
ftp://updates.redhat.com/4.2/alpha/ypserv-1.3.9-0.4.2.alpha.rpm
Sparc:
ftp://updates.redhat.com/4.2/sparc/ypserv-1.3.9-0.4.2.sparc.rpm
Source packages:
ftp://updates.redhat.com/4.2/SRPMS/ypserv-1.3.9-0.4.2.src.rpm
Red Hat Linux 5.x:
Intel:
ftp://updates.redhat.com/5.2/i386/ypserv-1.3.9-0.5.2.i386.rpm
Alpha:
ftp://updates.redhat.com/5.2/alpha/ypserv-1.3.9-0.5.2.alpha.rpm
Sparc:
ftp://updates.redhat.com/5.2/sparc/ypserv-1.3.9-0.5.2.sparc.rpm
Source packages:
ftp://updates.redhat.com/5.2/SRPMS/ypserv-1.3.9-0.5.2.src.rpm
Red Hat Linux 6.x:
Intel:
ftp://updates.redhat.com/6.1/i386/ypserv-1.3.9-1.i386.rpm
Alpha:
ftp://updates.redhat.com/6.0/alpha/ypserv-1.3.9-1.alpha.rpm
Sparc:
ftp://updates.redhat.com/6.0/sparc/ypserv-1.3.9-1.sparc.rpm
Source packages:
ftp://updates.redhat.com/6.1/SRPMS/ypserv-1.3.9-1.src.rpm
8. Solution:
For each RPM for your particular architecture, run:
rpm -Uvh 'filename'
where filename is the name of the RPM.
9. Verification:
MD5 sum Package Name
- --------------------------------------------------------------------------
d384966683e0c59b7c63d2d0fcba79ce ypserv-1.3.9-0.4.2.i386.rpm
e8e860c754e894b955c2ec3e73bcad8d ypserv-1.3.9-0.4.2.alpha.rpm
19cfbc0bf8ef5ed272243d74020b69df ypserv-1.3.9-0.4.2.sparc.rpm
df131f369bfb64d1b093447168484e38 ypserv-1.3.9-0.4.2.src.rpm
51a38316e72f25b6751ade459728f049 ypserv-1.3.9-0.5.2.i386.rpm
65da86b0b61ae70b82a5b3fe17b77803 ypserv-1.3.9-0.5.2.alpha.rpm
2956fc958456d5a91d697043932266bd ypserv-1.3.9-0.5.2.sparc.rpm
dda2d28bb89cddb9ecb4409778a548f9 ypserv-1.3.9-0.5.2.src.rpm
c1a566b7535bb51e25d9c1743f822682 ypserv-1.3.9-1.i386.rpm
a8f5a82d450ddb2b42068537859c18ae ypserv-1.3.9-1.alpha.rpm
6759503c9cc688bcd1902f6511ecc60a ypserv-1.3.9-1.sparc.rpm
f7e8b5a241c4e873822c83be2f0cf566 ypserv-1.3.9-1.src.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm --checksig <filename>
If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
rpm --checksig --nogpg <filename>
10. References:
<19991024163423.6665A67B0@Galois.suse.de>
- --------------------------END INCLUDED TEXT--------------------
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBOEJrbSh9+71yA2DNAQELHgP+JC771CHwVB4N105uuPn6eE5t5vczkhxH
X4gfpuRIONOm+J6bEGvBqC0hXDrZ6fpl89mGrWiy2Ft/s4m4jC4ZLxMnzro1gY4C
Fmva5AjGcN2IwnMKMg5L3rqomzOs+VlAO193PoAF5HLRDV3EvGU/ykfltQ48WkUh
qbCmekyxVrU=
=0Fvg
-----END PGP SIGNATURE-----
|