syscons CONS_SCRSHOT information disclosure
| syscons-consscrshot-info-disclosure (17584) |  Medium Risk |
Description:
syscons could allow a local attacker to obtain sensitive information, caused by improper validation by the CONS_SCRSHOT ioctl. A local attacker could insert large coordinates or negative coordinates into an input argument used by CONS_SCRSHOT ioctl, causing syscons to return portions of memory and allowing the attacker to obtain sensitive information.
Consequences:
Obtain Information
Remedy:
For FreeBSD:
Upgrade to the latest version of FreeBSD (RELENG_5_2, security branch dated later than 2004-09-30), as listed in FreeBSD Security Advisory FreeBSD-SA-04:15.syscons. See References.
— OR —
Apply the patch for this vulnerability, as listed in FreeBSD Security Advisory FreeBSD-SA-04:15.syscons. See References.
References:
- BugTraq Mailing List, Mon Oct 04 2004 - 15:54:11 CDT: FreeBSD Security Advisory FreeBSD-SA-04:15.syscons.
- FreeBSD Security Advisory FreeBSD-SA-04:15.syscons: Boundary checking errors in syscons.
- FreeBSD Web site: The FreeBSD Project.
- BID-11321: FreeBSD Syscons CONS_SCRSHOT Kernel Memory Disclosure Vulnerability
- CVE-2004-0919: The syscons CONS_SCRSHOT ioctl in FreeBSD 5.x allows local users to read arbitrary kernel memory via (1) negative coordinates or (2) large coordinates.
- SA12722: FreeBSD syscons Kernel Memory Disclosure Vulnerability
- US-CERT VU#969078: FreeBSD syscons fails to properly validate input in CONS_SCRSHOT ioctl
Platforms Affected:
- FreeBSD FreeBSD 5.0
- FreeBSD FreeBSD 5.0 Alpha
- FreeBSD FreeBSD 5.1
- FreeBSD FreeBSD 5.1 Alpha
- FreeBSD FreeBSD 5.2
- FreeBSD FreeBSD 5.2.1
- FreeBSD FreeBSD RELENG_5_2
Reported:
Oct 04, 2004
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