CVE-2009-4147

Public Exploit

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.

Category

7.2
CVSS
Severity: High
CVSS 2.0 •
EPSS 8.29% Top 10%
Vendor Advisory secunia.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/37154 vdb entry exploit
http://www.securityfocus.com/archive/1/508146/100/0/threaded mailing list
http://secunia.com/advisories/37517 third party advisory vendor advisory
http://people.freebsd.org/~cperciva/rtld.patch patch
http://www.securityfocus.com/archive/1/508142/100/0/threaded mailing list
http://www.securitytracker.com/id?1023250 vdb entry patch
http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html

Frequently Asked Questions

What is the severity of CVE-2009-4147?
CVE-2009-4147 has been scored as a high severity vulnerability.
How to fix CVE-2009-4147?
To fix CVE-2009-4147, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-4147 being actively exploited in the wild?
It is possible that CVE-2009-4147 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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