An explotable buffer overflow security problem in the amd daemon
which is part of the am-utils package has been fixed. This problem
is being actively exploted on the Internet and can be used to gain
root access on machines running amd.
Red Hat recommends anyone to upgrade to the fixed versions
immediately.
Red Hat, Inc. Security Advisory
Synopsis: Buffer overrun in amd
Advisory ID: RHSA-1999:032-01
Issue date: 1999-08-30
Keywords: amd am-utils buffer overflow remote exploit
1. Topic:
New packages of am-utils are available for all Red Hat Linux
platforms. This version includes an important security fix for a
buffer overrun problem which is being actively exploited on the
Internet..
2. Bug IDs fixed:
4690
3. Relevant releases/architectures:
Red Hat Linux 6.0, all architectures
Red Hat Linux 5.2, all architectures
Red Hat Linux 4.2, all architectures
4. Obsoleted by:
5. Conflicts with:
Red Hat Linux 4.2 shipped originally with a version of amd that
is no longer being maintained. Since Red Hat Linux 5.0 we have
switched to am-utils. This release of am-utils has been backported
to 4.2 and it will obsolete the original 4.2 amd package.
The following is valid for all releases and arcitectures: the
default configuration file format for amd that Red Hat used to ship
has been changed. Initially the /etc/amd.conf file used to be the
default map file that would allow access to the /net hierarchy. Now
/etc/amd.conf is the amd configuration file and the default map is
installed as /etc/amd.net.
6. RPMs required (for Red Hat Linux 6.0, 5.2 and 4.2
respectively):
Intel:
ftp://updates.redhat.com/6.0/i386/am-utils-6.0.1s11-1.6.0.i386.rpm
ftp://updates.redhat.com/5.2/i386/am-utils-6.0.1s11-1.5.2.i386.rpm
ftp://updates.redhat.com/4.2/i386/am-utils-6.0.1s11-1.4.2.i386.rpm
Alpha:
ftp://updates.redhat.com/6.0/alpha/am-utils-6.0.1s11-1.6.0.alpha.rpm
ftp://updates.redhat.com/5.2/alpha/am-utils-6.0.1s11-1.5.2.alpha.rpm
ftp://updates.redhat.com/4.2/alpha/am-utils-6.0.1s11-1.4.2.alpha.rpm
Sparc:
ftp://updates.redhat.com/6.0/sparc/am-utils-6.0.1s11-1.6.0.sparc.rpm
ftp://updates.redhat.com/5.2/sparc/am-utils-6.0.1s11-1.5.2.sparc.rpm
ftp://updates.redhat.com/4.2/sparc/am-utils-6.0.1s11-1.4.2.sparc.rpm
Source packages:
ftp://updates.redhat.com/6.0/SRPMS/am-utils-6.0.1s11-1.6.0.src.rpm
ftp://updates.redhat.com/5.2/SRPMS/am-utils-6.0.1s11-1.5.2.src.rpm
ftp://updates.redhat.com/4.2/SRPMS/am-utils-6.0.1s11-1.4.2.src.rpm
7. Problem description:
An explotable buffer overflow security problem in the amd daemon
which is part of the am-utils package has been fixed. This problem
is being actively exploted on the Internet and can be used to gain
root access on machines running amd.
Red Hat recommends anyone to upgrade to the fixed versions
immediately.
Thanks to Erez Zadok, the maintainer of am-utils for his
assistance in resolving this problem.
8. Solution:
For each RPM for your particular architecture, run:
rpm -Uvh
where filename is the name of the RPM.
9. Verification:
MD5 sum Package Name
0946dbc5539d208625eb27f506177ed2 i386/am-utils-6.0.1s11-1.6.0.i386.rpm 1a1ceb0ed50822776f605e60bbed1afb alpha/am-utils-6.0.1s11-1.6.0.alpha.rpm b68c6f2780f11ca71947673124bd8f11 sparc/am-utils-6.0.1s11-1.6.0.sparc.rpm 275997ded7f0c85efa6229963e84f668 SRPMS/am-utils-6.0.1s11-1.6.0.src.rpm e9a06fe4fdf56fdaa9fd984ef5988414 i386/am-utils-6.0.1s11-1.5.2.i386.rpm 617673437abaca052fe950c928722644 alpha/am-utils-6.0.1s11-1.5.2.alpha.rpm 23f3fbdf772eeb7ec67016d1c246225e sparc/am-utils-6.0.1s11-1.5.2.sparc.rpm 01ade16e4171a92fb1c10641846044a7 SRPMS/am-utils-6.0.1s11-1.5.2.src.rpm cf75db7b60b1d27093685e345153dfcd i386/am-utils-6.0.1s11-1.4.2.i386.rpm 3ec0520caa1a587133ea6cc105f4fc34 alpha/am-utils-6.0.1s11-1.4.2.alpha.rpm daf8bd0849c584e919fcd5ae8fb1e807 sparc/am-utils-6.0.1s11-1.4.2.sparc.rpm 0aa30be9b859eca2e003bb983c4839f5 SRPMS/am-utils-6.0.1s11-1.4.2.src.rpm
These packages are PGP 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 –nopgp
10. References:
N/A