Hewlett Packard Information for VU#745371

Multiple vendor telnet daemons vulnerable to buffer overflow via crafted protocol options



Vendor Statement


Originally issued: 16 October 2001

The information in the following Security Bulletin should be acted
upon as soon as possible. Hewlett-Packard Company will not be
liable for any consequences to any customer resulting from customer's
failure to fully implement instructions in this Security Bulletin as
soon as possible.

PROBLEM: Systems running telnetd may permit unauthorized remote
See: http://www.cert.org/advisories/CA-2001-21.html

This vulnerability has been assigned the identifier
CAN-2001-0554 by the Common Vulnerabilities and Exposures
(CVE) group:

PLATFORM: HP9000 Servers running HP-UX releases 10.X only.

DAMAGE: An intruder can potentially execute arbitrary code
with the privileges of the telnetd process.

SOLUTION: Apply the following patches to the release specified.

10.01 PHNE_24820,
10.10 PHNE_24820,
10.20 PHNE_24821,
SIS 10.20 PHNE_24822 (Telnet kerberos Patch),
10.24 PHNE_25217.

MANUAL ACTIONS: The Secure Internet Services (SIS) product, if
enabled, has to be disabled before the installation
or removal of PHNE_24822 (Telnet kerberos Patch).

AVAILABILITY: The patches are available now from http://itrc.hp.com.

A. Background
A potential remotely exploitable buffer overflow in telnetd has
been reported to Hewlett-Packard Company. It is unique to HP-UX
releases 10.X only.

B. Fixing the problem
Disable telnetd (by commenting out the /etc/inetd.conf entry for
telnetd and running '/usr/sbin/inetd -c') if telentd is not needed
on your system.

Install the appropriate patch from the list below.

C. Recommended solution

Apply the following patches to the release specified.

10.01 PHNE_24820,
10.10 PHNE_24820,
10.20 PHNE_24821,
SIS 10.20 PHNE_24822,
10.24 PHNE_25217.

All patches are available now from http://itrc.hp.com.

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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References



The CERT/CC has no additional comments at this time.

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