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CVE-2009-0641

HighPublished

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...

Published: Feb 18, 2009
Updated: Aug 7, 2024
Assigning CNA: mitre
Evidence observed: Feb 16, 2009

Primary CVSS

9.3/ 10High

nvd · CVSS 2.0

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

EPSS probability estimate

9.3%

Low · next 30 days

Percentile: 95.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

FreeBSD 7.0-RELEASE - Telnet Daemon Privilege EscalationExploit
kingcope · freebsd · Feb 16, 2009

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