FreeBSD kernel openpty() information disclosure
| freebsd-openpty-information-disclosure (39665) |  Low Risk |
Description:
The FreeBSD kernel could allow a local attacker to obtain sensitive information, caused by an implementation error in the openpty() function when the permissions are set for opened pseudo terminals. By executing a program that calls the openpty() function internally, a local attacker could exploit this vulnerability to read the text from the pseudo terminal opened by a non-root user and obtain sensitive information.
Platforms Affected:
- FreeBSD, FreeBSD 5.0
Remedy:
Refer to FreeBSD-SA-08:01.pty for patch or upgrade information. See References.
Consequences:
Obtain Information
References:
- FreeBSD-SA-08:01.pty , pty snooping at http://security.freebsd.org/advisories/FreeBSD-SA-08:01.pty.asc.
- BID-27284: FreeBSD pty Handling Multiple Local Information Disclosure Vulnerabilities
- 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.
- SA28498: FreeBSD pty Snooping Vulnerabilities
- SECTRACK ID: 1019191: FreeBSD pty May Disclose Information to Local Users
Reported:
Jan 14, 2008
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