5996 : FreeBSD seyon PATH Variable Subversion Local Privilege Escalation
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
6	943	over 10 years ago	11 months ago	3 times	90%

Timeline

Disclosure Date
1999-11-08

Description

FreeBSD contains the port seyon, which is flawed and may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when a malicious user places a fake "seyon-emu" or "xterm" in a newly created directory and sets its PATH. Envoking seyon will cause seyon to search the value in $PATH for "xterm" and "seyon-emu" and once it locates either one, the fake will be executed by seyon with seyon privileges. This flaw may lead to a loss of integrity.

Classification

Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Exploit: Exploit Public

Solution

Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround: chmod 750 `which seyon` and add selected users to the "dialer" group.

Products

The FreeBSD Project

FreeBSD

3.3

Muhammad M. Saggaf

Seyon

2.14b

References

Related OSVDB ID: 1149
Exploit Database: 19609
CVE ID: 1999-0820 (see also: NVD)
ISS X-Force ID: 3483
Bugtraq ID: 780
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/1999-q3/1542.html
http://archives.neohapsis.com/archives/bugtraq/1999-q3/1552.html
http://archives.neohapsis.com/archives/bugtraq/1999-q3/1561.html
http://archives.neohapsis.com/archives/bugtraq/1999-q4/0148.html

Credit

Brock Tellier - btellierwebley.com -

CVSSv2 Score

CVSSv2 Base Score = 4.6
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

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