Published: 02/12/2009 Updated: 22/05/2019

CVSS v2 Base Score: 7.2 | Impact Score: 10 | Exploitability Score: 3.9

VMScore: 725

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147.

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freebsd freebsd 7.1
freebsd freebsd 7.2
freebsd freebsd 8.0

Discovered & Exploited by Nikolaos Rangos also known as Kingcope Nov 2009 "BiG TiME" "Go fetch your FreeBSD r00tkitz" // wwwyoutubecom/watch?v=dDnhthI27Fg There is an unbelievable simple local r00t bug in recent FreeBSD versions I audited FreeBSD for local r00t bugs a long time *sigh* Now it pays out The bug resides in the Run-T ...

CWE-264 http://www.securityfocus.com/archive/1/508168/100/0/threaded http://www.securitytracker.com/id?1023250 http://www.securityfocus.com/bid/37154 http://secunia.com/advisories/37517 http://people.freebsd.org/~cperciva/rtld.patch http://www.securityfocus.com/archive/1/508146/100/0/threaded http://www.securityfocus.com/archive/1/508142/100/0/threaded http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html https://nvd.nist.gov https://www.exploit-db.com/exploits/10255/

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CVE-2009-4146

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