Vulnerability in FreeBSD
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) 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.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 7.2 (High). Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.037 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000
Affected products
- FreeBSD — versions 7.1, 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/37154 (Exploit, vdb-entry)
- www.securityfocus.com/archive/1/508146/100/0/threaded (mailing-list)
- secunia.com/advisories/37517 (Vendor Advisory, third-party-advisory)
- people.freebsd.org/~cperciva/rtld.patch (Patch)
- www.securityfocus.com/archive/1/508142/100/0/threaded (mailing-list)
- www.securitytracker.com/id (Patch, vdb-entry)
- packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.ht…
Frequently asked questions
- What is CVE-2009-4147?
- CVE-2009-4147 is a vulnerability in FreeBSD, classified under CWE-264. Published 2009-12-02.
- Is CVE-2009-4147 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.