CVE-2009-0641
sys_term.c in telnetd in FreeBSD 7.0-RELEASE and other 7.x versions deletes dangerous environment...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2009-0641- CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-16, CWE-264
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2009-0641- Updated
- 2026-11-02
EUVDEUVD-2009-0644 No score
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.
- Record
EUVD-2009-0644- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5vvp-mjcx-6cg5 No score
sys_term.c in telnetd in FreeBSD 7.0-RELEASE and other 7.x versions deletes dangerous environment...
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.
- Record
GHSA-5vvp-mjcx-6cg5- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | FreeBSD 7.0-RELEASE - Telnet Daemon Privilege Escalation | 2009-02-16 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-0641 is a high vulnerability (CVSS 9.3) in Freebsd, published February 18, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 9.32%, the 95th percentile. No source names a fixed version.
References
security.freebsd.org/advisories/FreeBSD-SA-09:05.telnetd.asc
exchange.xforce.ibmcloud.com/vulnerabilities/48780
securityfocus.com/bid/33777
lists.grok.org.uk/pipermail/full-disclosure/2009-February/067954.html
exploit-db.com/exploits/8055
nvd.nist.gov/vuln/detail/CVE-2009-0641
github.com/advisories/GHSA-5vvp-mjcx-6cg5