CVE-2009-0641

Severity

93%

Complexity

86%

Confidentiality

165%

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.

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.

CVSS 2.0 Base Score 9.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:C/I:C/A:C).

Overview

Type

FreeBSD

First reported 16 years ago

2009-02-20 06:47:00

Last updated 7 years ago

2017-09-29 01:33:00

Affected Software

FreeBSD 7.0

7.0

FreeBSD 7.1

7.1

FreeBSD 7.1 Release Candidate 1

7.1

References

20090214 FreeBSD zeroday

Exploit

FreeBSD-SA-09:05

Patch

33777

Exploit

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

8055

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