PT-2002-1787 · Openbsd · Openbsd

Published 2002-08-12 · Updated 2008-09-10 · CVE-2002-0766

Positive Technologies (AI Summary)

CVSS v2.0

7.2

High

Base vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: OpenBSD versions 2.9 through 3.1

Description: The issue allows local users to cause a denial of service and gain root privileges by exploiting a flaw in how the kernel handles file descriptors. Specifically, filling the kernel's file descriptor table and closing file descriptors 0, 1, or 2 before executing a privileged process can lead to this issue, as OpenBSD fails to properly handle the situation when it cannot open an alternate descriptor.

Recommendations: For OpenBSD versions 2.9 through 3.1, consider restricting access to privileged processes until a fix is available, and avoid closing critical file descriptors 0, 1, or 2 to minimize the risk of exploitation.

Fix

Related Identifiers

CVE-2002-0766

Affected Products

Openbsd

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2002-0766 · Security Note
• http://iss.net/security_center/static/9048.php · Vendor Advisory
• http://openbsd.org/errata.html#fdalloc2 · Vendor Advisory
• http://osvdb.org/5114 · Note
• http://kb.cert.org/vuls/id/314963 · Note
• http://osvdb.org/5715 · Note
• http://securityfocus.com/bid/4708 · Note
• http://online.securityfocus.com/archive/1/271702 · Note