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Test ID:1.3.6.1.4.1.25623.1.0.60188
Category:FreeBSD Local Security Checks
Title:FreeBSD Security Advisory (FreeBSD-SA-08:01.pty.asc)
Summary:NOSUMMARY
Description:Description:
The remote host is missing an update to the system
as announced in the referenced advisory FreeBSD-SA-08:01.pty.asc

pt_chown is a setuid root support utility used by grantpt(3) to change
ownership of a tty.

openpty(3) is a support function in libutil which is used to obtain a
pseudo-terminal.

script(1) is a utility which makes a typescript of everything printed
on a terminal.

Two issues exist in the FreeBSD pty handling.

If openpty(3) is called as non-root user the newly created
pseudo-terminal is world readable and writeable. While this is
documented to be the case, script(1) still uses openpty(3) and
script(1) may be used by non-root users [CVE-2008-0217].

The ptsname(3) function incorrectly extracts two characters from the
name of a device node in /dev without verifying that it's actually
operating on a valid pty which the calling user owns. pt_chown uses
the bad result from ptsname(3) to change ownership of a pty to the
user calling pt_chown [CVE-2008-0216].

Solution:
Upgrade your system to the appropriate stable release
or security branch dated after the correction date

http://www.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-08:01.pty.asc

CVSS Score:
2.1

CVSS Vector:
AV:L/AC:L/Au:N/C:N/I:P/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2008-0216
BugTraq ID: 27284
http://www.securityfocus.com/bid/27284
FreeBSD Security Advisory: FreeBSD-SA-08:01
http://security.FreeBSD.org/advisories/FreeBSD-SA-08:01.pty.asc
http://www.securitytracker.com/id?1019191
http://secunia.com/advisories/28498
XForce ISS Database: freebsd-ptsname-information-disclosure(39667)
https://exchange.xforce.ibmcloud.com/vulnerabilities/39667
CopyrightCopyright (c) 2008 E-Soft Inc. http://www.securityspace.com

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