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AUSCERT External Security Bulletin Redistribution
ESB-2001.344 -- RHSA-2001:099-06
New telnet packages available to fix buffer overflow vulnerabilities
14 August 2001
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AusCERT Security Bulletin Summary
---------------------------------
Product: telnet
telnet-server
Vendor: Red Hat
Operating System: Red Hat Linux 5.2
Red Hat Linux 6.2
Red Hat Linux 7.0
Red Hat Linux 7.1
Platform: Alpha
i386
IA-64
Sparc
Impact: Root Compromise
Access Required: Existing Account
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Red Hat, Inc. Red Hat Security Advisory
Synopsis: New telnet packages available to fix buffer overflow vulnerabilities
Advisory ID: RHSA-2001:099-06
Issue date: 2001-08-02
Updated on: 2001-08-09
Product: Red Hat Linux
Keywords: telnet buffer overflow
Cross references:
Obsoletes:
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1. Topic:
New telnet, telnet-server packages are available for Red Hat Linux 5.2,
6.2, 7.0 and 7.1.
These packages fix a problem where buffer overflows can provide root
access to local users.
It is recommended that all users update to the fixed packages.
2. Relevant releases/architectures:
Red Hat Linux 5.2 - alpha, i386, sparc
Red Hat Linux 6.2 - alpha, i386, sparc
Red Hat Linux 7.0 - alpha, i386
Red Hat Linux 7.1 - alpha, i386, ia64
3. Problem description:
4. Solution:
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
To update all RPMs for your particular architecture, run:
rpm -Fvh [filenames]
where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.
Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:
up2date
This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
50335 - telnetd segfaults during session negotiation
6. RPMs required:
Red Hat Linux 5.2:
SRPMS:
ftp://updates.redhat.com/5.2/en/os/SRPMS/telnet-0.17.5x-18.src.rpm
alpha:
ftp://updates.redhat.com/5.2/en/os/alpha/telnet-0.17.5x-18.alpha.rpm
i386:
ftp://updates.redhat.com/5.2/en/os/i386/telnet-0.17.5x-18.i386.rpm
sparc:
ftp://updates.redhat.com/5.2/en/os/sparc/telnet-0.17.5x-18.sparc.rpm
Red Hat Linux 6.2:
SRPMS:
ftp://updates.redhat.com/6.2/en/os/SRPMS/telnet-0.17.6x-18.src.rpm
alpha:
ftp://updates.redhat.com/6.2/en/os/alpha/telnet-0.17.6x-18.alpha.rpm
ftp://updates.redhat.com/6.2/en/os/alpha/telnet-server-0.17.6x-18.alpha.rpm
i386:
ftp://updates.redhat.com/6.2/en/os/i386/telnet-0.17.6x-18.i386.rpm
ftp://updates.redhat.com/6.2/en/os/i386/telnet-server-0.17.6x-18.i386.rpm
sparc:
ftp://updates.redhat.com/6.2/en/os/sparc/telnet-0.17.6x-18.sparc.rpm
ftp://updates.redhat.com/6.2/en/os/sparc/telnet-server-0.17.6x-18.sparc.rpm
Red Hat Linux 7.0:
SRPMS:
ftp://updates.redhat.com/7.0/en/os/SRPMS/telnet-0.17-18.src.rpm
alpha:
ftp://updates.redhat.com/7.0/en/os/alpha/telnet-0.17-18.alpha.rpm
ftp://updates.redhat.com/7.0/en/os/alpha/telnet-server-0.17-18.alpha.rpm
i386:
ftp://updates.redhat.com/7.0/en/os/i386/telnet-0.17-18.i386.rpm
ftp://updates.redhat.com/7.0/en/os/i386/telnet-server-0.17-18.i386.rpm
Red Hat Linux 7.1:
SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/telnet-0.17-18.src.rpm
alpha:
ftp://updates.redhat.com/7.1/en/os/alpha/telnet-0.17-18.alpha.rpm
ftp://updates.redhat.com/7.1/en/os/alpha/telnet-server-0.17-18.alpha.rpm
i386:
ftp://updates.redhat.com/7.1/en/os/i386/telnet-0.17-18.i386.rpm
ftp://updates.redhat.com/7.1/en/os/i386/telnet-server-0.17-18.i386.rpm
ia64:
ftp://updates.redhat.com/7.1/en/os/ia64/telnet-0.17-18.ia64.rpm
ftp://updates.redhat.com/7.1/en/os/ia64/telnet-server-0.17-18.ia64.rpm
7. Verification:
MD5 sum Package Name
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b3e43fdd61e66fdf92b1c12dfbc25b1b 5.2/en/os/SRPMS/telnet-0.17.5x-18.src.rpm
23b34e59f5abc3d6f336f4bcaf2cfc94 5.2/en/os/alpha/telnet-0.17.5x-18.alpha.rpm
c075640ce8b75d1428c67c71cb08916e 5.2/en/os/i386/telnet-0.17.5x-18.i386.rpm
c13e1c86ef08363ed317550e2e87429f 5.2/en/os/sparc/telnet-0.17.5x-18.sparc.rpm
65a4919d0145366c84b2b758747153f5 6.2/en/os/SRPMS/telnet-0.17.6x-18.src.rpm
adb09756c21b4b920c47896b10263a52 6.2/en/os/alpha/telnet-0.17.6x-18.alpha.rpm
fc7d07585a065fbce46a35374a65c036 6.2/en/os/alpha/telnet-server-0.17.6x-18.alpha.rpm
cda5430e3ea6d337fbdb5d7284bbe404 6.2/en/os/i386/telnet-0.17.6x-18.i386.rpm
3222d7d4cc431ca93af62b491330d17c 6.2/en/os/i386/telnet-server-0.17.6x-18.i386.rpm
f4bfa409ecf232b5a16dee770a1d42ea 6.2/en/os/sparc/telnet-0.17.6x-18.sparc.rpm
4a78871d19f2cfebb22c29e1dd520f36 6.2/en/os/sparc/telnet-server-0.17.6x-18.sparc.rpm
5ca95a0c67a627406687e2059d62231d 7.0/en/os/SRPMS/telnet-0.17-18.src.rpm
4240f534045e52321cdfbb09e2079e67 7.0/en/os/alpha/telnet-0.17-18.alpha.rpm
a4119b8f0341eaf057c6ae5d8d429255 7.0/en/os/alpha/telnet-server-0.17-18.alpha.rpm
b3a99b8783a1a1691e72aaad460ed980 7.0/en/os/i386/telnet-0.17-18.i386.rpm
dbf205157cdaf3295cb62d4e3f6a2407 7.0/en/os/i386/telnet-server-0.17-18.i386.rpm
5ca95a0c67a627406687e2059d62231d 7.1/en/os/SRPMS/telnet-0.17-18.src.rpm
4240f534045e52321cdfbb09e2079e67 7.1/en/os/alpha/telnet-0.17-18.alpha.rpm
a4119b8f0341eaf057c6ae5d8d429255 7.1/en/os/alpha/telnet-server-0.17-18.alpha.rpm
b3a99b8783a1a1691e72aaad460ed980 7.1/en/os/i386/telnet-0.17-18.i386.rpm
dbf205157cdaf3295cb62d4e3f6a2407 7.1/en/os/i386/telnet-server-0.17-18.i386.rpm
c5134322a906709639a3885014462bf9 7.1/en/os/ia64/telnet-0.17-18.ia64.rpm
ad6090dbfbd9140eb77a26316de17300 7.1/en/os/ia64/telnet-server-0.17-18.ia64.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>
8. References:
Copyright(c) 2000, 2001 Red Hat, Inc.
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