National Cyber Awareness System

Vulnerability Summary for CVE-2001-1180

Overview

FreeBSD 4.3 does not properly clear shared signal handlers when executing a process, which allows local users to gain privileges by calling rfork with a shared signal handler, having the child process execute a setuid program, and sending a signal to the child.

Impact

CVSS Severity (version 2.0 incomplete approximation):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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US-CERT Vulnerability Note: VU#943633

Name: VU#943633

Type: Advisory; Patch Information

Hyperlink:http://www.kb.cert.org/vuls/id/943633

External Source: BID

Name: 3007

Type: Advisory; Patch Information; Exploit

Hyperlink:http://www.securityfocus.com/bid/3007

External Source: BUGTRAQ

Name: 20010710 FreeBSD 4.3 local root, yet Linux and *BSD much better than Windows

Type: Advisory; Patch Information; Exploit

Hyperlink:http://archives.neohapsis.com/archives/bugtraq/2001-07/0179.html

External Source: XF

Name: bsd-rfork-signal-handlers(6829)

Type: Advisory

Hyperlink:http://xforce.iss.net/static/6829.php

External Source: OSVDB

Name: 1897

Hyperlink:http://www.osvdb.org/1897

External Source: CIAC

Name: L-111

Hyperlink:http://ciac.llnl.gov/ciac/bulletins/l-111.shtml

External Source: FREEBSD

Name: FreeBSD-SA-01:42

Hyperlink:ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:42.signal.v1.1.asc