CVE-2009-4147

Severity

72%

Complexity

39%

Confidentiality

165%

The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1 and 8.0 does not clear the (1) LD_LIBMAP, (2) LD_LIBRARY_PATH, (3) LD_LIBMAP_DISABLE, (4) LD_DEBUG, and (5) LD_ELF_HINTS_PATH environment variables, which allows local users to gain privileges by executing a setuid or setguid program with a modified variable containing an untrusted search path that points to a Trojan horse library, different vectors than CVE-2009-4146.

The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1 and 8.0 does not clear the (1) LD_LIBMAP, (2) LD_LIBRARY_PATH, (3) LD_LIBMAP_DISABLE, (4) LD_DEBUG, and (5) LD_ELF_HINTS_PATH environment variables, which allows local users to gain privileges by executing a setuid or setguid program with a modified variable containing an untrusted search path that points to a Trojan horse library, different vectors than CVE-2009-4146.

CVSS 2.0 Base Score 7.2. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C).

Overview

Type

FreeBSD

First reported 15 years ago

2009-12-02 19:30:00

Last updated 5 years ago

2019-05-22 03:29:00

Affected Software

FreeBSD 7.1

7.1

FreeBSD 8.0

8.0

References

http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html

http://people.freebsd.org/~cperciva/rtld.patch

Patch

37517

Vendor Advisory

20091130 ** FreeBSD local r00t zeroday

20091201 Upcoming FreeBSD Security Advisory

37154

Exploit

1023250

Patch

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