Vulnerability record · CVE-2009-0641 · published 20 February 2009

CVE-2009-0641: Freebsd permissions and access controls vulnerability

Freebsd · Freebsd

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.

9.3 CVSS 2.0 High EPSS 9.3% · top 4.8% CWE-16 · CWE-16CWE-264 · Permissions and access controls

9.3CVSS 2.0 base score

9.3%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

10References, 4 tagged exploit

16 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Freebsd Freebsd

References

Link	Tags
http://lists.grok.org.uk/pipermail/full-disclosure/2009-February/067954.html	Exploit
http://security.freebsd.org/advisories/FreeBSD-SA-09:05.telnetd.asc	Patch
http://www.securityfocus.com/bid/33777	Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/48780
https://www.exploit-db.com/exploits/8055
http://lists.grok.org.uk/pipermail/full-disclosure/2009-February/067954.html	Exploit
http://security.freebsd.org/advisories/FreeBSD-SA-09:05.telnetd.asc	Patch
http://www.securityfocus.com/bid/33777	Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/48780
https://www.exploit-db.com/exploits/8055

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-0641), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.