Unscored severity · published Dec 2, 2009
CVE-2009-4147
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)…
–
CVSS
3.7%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freebsd · Freebsd
7.1; 8.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2009-4147
CVE.org
https://www.cve.org/CVERecord?id=CVE-2009-4147
packetstormsecurity.com
http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html
Patch
http://people.freebsd.org/~cperciva/rtld.patch
Vendor Advisory
http://secunia.com/advisories/37517
www.securityfocus.com
http://www.securityfocus.com/archive/1/508142/100/0/threaded
www.securityfocus.com
http://www.securityfocus.com/archive/1/508146/100/0/threaded
Exploit
http://www.securityfocus.com/bid/37154
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