CVE-2009-0641 EXPLOIT
9.3
HIGH · CVSS 2.0 · EPSS 9.3% (pctl 95)
Patch early
A public exploit exists.
Description
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.
Scoring
| CVSS | 9.3 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:M/Au:N/C:C/I:C/A:C |
| EPSS | 9.32% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-16 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2009-02-20 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| freebsd | freebsd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | FreeBSD 7.0-RELEASE - Telnet Daemon Privilege Escalation | 2009-02-16 |
References
- http://lists.grok.org.uk/pipermail/full-disclosure/2009-February/067954.html
- http://security.freebsd.org/advisories/FreeBSD-SA-09:05.telnetd.asc
- http://www.securityfocus.com/bid/33777
- 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
- http://security.freebsd.org/advisories/FreeBSD-SA-09:05.telnetd.asc
- http://www.securityfocus.com/bid/33777
- https://exchange.xforce.ibmcloud.com/vulnerabilities/48780
- https://www.exploit-db.com/exploits/8055
→ the Explorer · watch your stack · NVD