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FreeBSD pty hijacking
Published: 16.01.2008
Source: BUGTRAQ
SecurityVulns ID: 8570
Type: remote
Level: 5/10
Description: 'script' users openpty in insecure way, ptsname incorrectly extracts device name.

Affected: FREEBSD : FreeBSD 7.0
FREEBSD : FreeBSD 6.1
FREEBSD : FreeBSD 5.5
FREEBSD : FreeBSD 6.2
FREEBSD : FreeBSD 6.3
CVE: CVE-2008-0217 (The script program in FreeBSD 5.0 through 7.0-PRERELEASE invokes openpty, which creates a pseudo-terminal with world-readable and world-writable permissions when it is not run as root, which allows local users to read data from the terminal of the user running script.)
CVE-2008-0216 (The ptsname function in FreeBSD 6.0 through 7.0-PRERELEASE does not properly verify that a certain portion of a device name is associated with a pty of a user who is calling the pt_chown function, which might allow local users to read data from the pty from another user.)

Original document FREEBSD, FreeBSD Security Advisory FreeBSD-SA-08:01.pty (16.01.2008)

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