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CERT Coordination Center


HP-UX "kermit" vulnerable to buffer overflow

Vulnerability Note VU#971364

Original Release Date: 2003-05-19 | Last Revised: 2003-05-19

Overview

HP-UX's implementation of kermit contains a buffer overflow which may allow a local attacker to gain elevated privileges.

Description

From the Kermit Project:

Kermit software offers interactive and scripted file transfer and management, terminal emulation, Unicode-aware character-set conversion, and/or Internet security for Windows, Linux, FreeBSD, OpenBSD, NetBSD, Mac OS X, Solaris, AIX, HP-UX, Tru64 Unix, SCO, QNX, OS/2, VMS, DOS, IBM mainframes, and dozens of other platforms, new and old, over the Internet as well as serial ports and modems. Internet security methods include Kerberos IV, Kerberos V, SSL, TLS, SSH, and SRP. Internet protocols include traditional and secure Telnet, traditional and secure FTP, traditional and secure HTTP. All functions can be automated using Kermit's built-in cross-platform script programming language. Terminal emulations for Windows include VT100, VT220, VT320, ANSI, HP, IBM, Linux Console, Sun Console, QNX, AT386, SCO ANSI, SNI 97801, Televideo, Wyse, and many others.
The version of Kermit shipping with HP9000 Series 700/800 running HP-UX releases 10.20 and 11.00 contains a locally exploitable buffer overflow which may allow a local attacker to gain elevated privileges.

Impact

From the HP-UX security bulletins digest (HPSBUX0305-259):
A problem has been reported in kermit which could allow access to account bin and group daemon privileges. Until a fix is available we recommend removing suid/sgid permissions from kermit. This will limit the functionality of kermit. Full functionality will be available only to the root user.

Solution

Until a patch is available, you may wish to follow Hewlett-Packard Company's advice to remove suid permissions from /usr/bin/kermit. According to Hewlett-Packard Company, this will limit the functionality of kermit. Full functionality will be available only to the root user.

Vendor Information

971364
Expand all

Hewlett-Packard Company

Updated:  May 19, 2003

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Addendum

Please see Hewlett-Packard Company Security Bulletin HPSBUX0305-259.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

This vulnerability was discovered by bt of delfi.lt. The CERT/CC thanks Hewlett-Packard Company for producing Security Bulletin: HPSBUX0305-259, upon which this document is based.

This document was written by Ian A Finlay.

Other Information

CVE IDs: None
Severity Metric: 28.13
Date Public: 2003-05-02
Date First Published: 2003-05-19
Date Last Updated: 2003-05-19 18:49 UTC
Document Revision: 12

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