National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-0641)

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Last updated: Mon May 20 23:58:35 EDT 2013

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Vulnerability Summary for CVE-2009-0641

Original release date:02/20/2009

Last revised:02/21/2009

Source: US-CERT/NIST

Overview

sys_term.c in telnetd in FreeBSD 7.0-RELEASE and other 7.x versions deletes dangerous environment variables with a method that was valid only in older FreeBSD distributions, which might allow remote attackers to execute arbitrary code by passing a crafted environment variable from a telnet client, as demonstrated by an LD_PRELOAD value that references a malicious library.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:9.3 (HIGH) (AV:N/AC:M/Au:N/C:C/I:C/A:C) (legend)

Impact Subscore: 10.0

Exploitability Subscore: 8.6

CVSS Version 2 Metrics:

Access Vector: Network exploitable

Access Complexity: Medium

Authentication: Not required to exploit

Impact Type:Provides administrator access, Allows complete confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service

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External Source: FREEBSD

Name: FreeBSD-SA-09:05

Type: Patch Information

Hyperlink:http://security.freebsd.org/advisories/FreeBSD-SA-09:05.telnetd.asc

External Source: XF

Name: freebsd-telnet-ldpreload-code-execution(48780)

Hyperlink:http://xforce.iss.net/xforce/xfdb/48780

External Source: BID

Name: 33777

Hyperlink:http://www.securityfocus.com/bid/33777

External Source: MILW0RM

Name: 8055