FreeBSD libmytinfo Buffer Overflow Vulnerability

BID:1185

Info

FreeBSD libmytinfo Buffer Overflow Vulnerability

Bugtraq ID: 1185
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: Yes
Published: May 09 1990 12:00AM
Updated: May 09 1990 12:00AM
Credit: This vulnerability was posted in thge form of an advisory to the Bugtraq mailing list on Tue, 9 May 2000 by the FreeBSD Security Officer <[email protected]>.
Vulnerable: FreeBSD FreeBSD 3.4
FreeBSD FreeBSD 3.3
FreeBSD FreeBSD 3.2
FreeBSD FreeBSD 3.1
FreeBSD FreeBSD 3.0
Not Vulnerable: FreeBSD FreeBSD 5.0 alpha
FreeBSD FreeBSD 5.0
FreeBSD FreeBSD 4.0 alpha
FreeBSD FreeBSD 4.0

Discussion

FreeBSD libmytinfo Buffer Overflow Vulnerability

libmytinfo is a library used in FreeBSD which allows users to specify alternate termcap files or entries via the TERMCAP environment variable. The library itself is flawed and does not check bounds on user supplied data and hence suffers from a buffer overflow. Programs which link against this library and are setuid/setgid could be exploited to elavate privileges up to and possibly including root.

This problem is not believed to affect any base binaries in the FreeBSD system; rather, it is thought that this affects only ports. However, this may prove to be incorrect over time.

Exploit / POC

FreeBSD libmytinfo Buffer Overflow Vulnerability

Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

Solution / Fix

FreeBSD libmytinfo Buffer Overflow Vulnerability


FreeBSD FreeBSD 3.0

FreeBSD FreeBSD 3.1

FreeBSD FreeBSD 3.2

FreeBSD FreeBSD 3.3

FreeBSD FreeBSD 3.4

References

FreeBSD libmytinfo Buffer Overflow Vulnerability

References:
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