---

Red Hat Security Advisory: new NFS server pacakges available (5.2, 4.2)

Date: Thu, 11 Nov 1999 01:37:43 -0500
From: Bill Nottingham <<a
href=”mailto:[email protected]”>[email protected]>
To: [email protected]


Red Hat, Inc. Security Advisory

Synopsis: new NFS server packages available (5.2, 4.2)
Advisory ID: RHSA-1999:053-01
Issue date: 1999-11-11
Updated on: 1999-11-11
Keywords: nfs-server PATH_MAX NAME_MAX rpc.nfsd
Cross references: Bugtraq id #782


1. Topic:

A buffer overflow exists in the user space NFS daemon that
shipped with Red Hat Linux 4.2 and 5.2.

2. Relevant releases/architectures:

Red Hat Linux 4.x, all platforms
Red Hat Linux 5.x, all platforms

Red Hat Linux 6.x uses the knfsd kernel space NFS daemon, and is
not affected by this problem.

3. Problem description:

The length of a path name was not checked on the removal of a
directory. If a long enough directory name was created, the buffer
holding the pathname would overflow, and the possibility exists
that arbitrary code could be executed as the user the NFS server
runs as (root). Exploiting this buffer overflow does require
read/write access to a share on an affected server.

4. Solution:

It is recommended that all users of Red Hat Linux 4.x and 5.x
update to the fixed packages.

Thanks go to Olaf Kirch ([email protected]) for providing a
fix.

For each RPM for your particular architecture, run:
rpm -Uvh
where filename is the name of the RPM.

5. Bug IDs fixed (http://developer.redhat.com/bugzilla
for more info):

6. Obsoleted by:

7. Conflicts with:

8. RPMs required:

Red Hat Linux 4.x:

Intel:

ftp://updates.redhat.com/4.2/i386/nfs-server-2.2beta47-0.i386.rpm


ftp://updates.redhat.com/4.2/i386/nfs-server-clients-2.2beta47-0.i386.rpm

Alpha:

ftp://updates.redhat.com/4.2/alpha/nfs-server-2.2beta47-0.alpha.rpm


ftp://updates.redhat.com/4.2/alpha/nfs-server-clients-2.2beta47-0.alpha.rpm

Sparc:

ftp://updates.redhat.com/4.2/sparc/nfs-server-2.2beta47-0.sparc.rpm


ftp://updates.redhat.com/4.2/sparc/nfs-server-clients-2.2beta47-0.sparc.rpm

Source packages:

ftp://updates.redhat.com/4.2/SRPMS/nfs-server-2.2beta47-0.src.rpm

Red Hat Linux 5.x:

Intel:

ftp://updates.redhat.com/5.2/i386/nfs-server-2.2beta47-1.i386.rpm


ftp://updates.redhat.com/5.2/i386/nfs-server-clients-2.2beta47-1.i386.rpm

Alpha:

ftp://updates.redhat.com/5.2/alpha/nfs-server-2.2beta47-1.alpha.rpm


ftp://updates.redhat.com/5.2/alpha/nfs-server-clients-2.2beta47-1.alpha.rpm

Sparc:

ftp://updates.redhat.com/5.2/sparc/nfs-server-2.2beta47-1.sparc.rpm


ftp://updates.redhat.com/5.2/sparc/nfs-server-clients-2.2beta47-1.sparc.rpm

Source packages:

ftp://updates.redhat.com/5.2/SRPMS/nfs-server-2.2beta47-1.src.rpm

9. Verification:

MD5 sum                           Package Name


09b6c7ff370f58140aac7d1a41b50035 i386/nfs-server-2.2beta47-0.i386.rpm
14e1e5e5bcba01f9bb9cb6dfe9e2627e i386/nfs-server-clients-2.2beta47-0.i386.rpm
9ce6b7afd8ef5a1d5b481ee9fe2530d3 alpha/nfs-server-2.2beta47-0.alpha.rpm
6306ba518cd64b0d018b8b2786ecb128 alpha/nfs-server-clients-2.2beta47-0.alpha.rpm
cf15f95dd9b13844b63a9e7607a873ee sparc/nfs-server-2.2beta47-0.sparc.rpm
a450ee5b850fb6ed906b3527a2165ec5 sparc/nfs-server-clients-2.2beta47-0.sparc.rpm
e6ffef85c75620ebebf0c3244a181c46 SRPMS/nfs-server-2.2beta47-0.src.rpm

1d408903070fa5313072fe8886917bda i386/nfs-server-2.2beta47-1.i386.rpm
e4c30ae30f3cbdd4ff2cd90232c46e0e i386/nfs-server-clients-2.2beta47-1.i386.rpm
1d6f0a6c28b4cb20e1f203bb8d376af1 alpha/nfs-server-2.2beta47-1.alpha.rpm
75f89bcd51df6771d993aaee6f812ce7 alpha/nfs-server-clients-2.2beta47-1.alpha.rpm
0dc37d253e7620ce300ef51b15af562b sparc/nfs-server-2.2beta47-1.sparc.rpm
21c743b1631db675dd1aac7007c9a37a sparc/nfs-server-clients-2.2beta47-1.sparc.rpm
810ca1bd9d362031ed21c664eb2024ac SRPMS/nfs-server-2.2beta47-1.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

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

10. References: