CVE-2011-4642
Splunk 4.2.x mappy.py allows remote code execution by authenticated admins via CSRF (SPL-45172)
- CVSS 4.6
- CWE-352 Cross-Site Request Forgery (CSRF)
- Input Validation and Sanitization
- Remote
mappy.py in Splunk Web in Splunk 4.2.x before 4.2.5 does not properly restrict use of the mappy command to access Python classes, which allows remote authenticated administrators to execute arbitrary code by leveraging the sys module in a request to the search application, as demonstrated by a cross-site request forgery (CSRF) attack, aka SPL-45172.
- CVSS base score
- 4.6
- Published
- 2012-01-03
- OWASP
- A10 Server Side Request Forgery (SSRF)
- Orthogonal defect classification
- Function
- Code defect classification
- Incorrect Functionality
- Category
- Input Validation and Sanitization
- Subcategory
- Command Injection
- Accessibility scope
- Remote
- Impact
- Arbitrary Code Execution
- Fixed by upgrading
- Yes
Solution
Upgrade to Splunk version 4.2.5 or higher.
Vulnerable code sample
import splunk.admin as admin
class Mappy(admin.MConfigHandler):
def setup(self):
"""Vulnerable function that demonstrates the security issue."""
self.supportedArgs.addOptArg('command')
self.supportedArgs.addOptArg('arg1')
self.supportedArgs.addOptArg('arg2')
def handleList(self, confInfo):
"""Vulnerable function that demonstrates the security issue."""
command = self.getArg('command')
result = eval(command)(self.getArg('arg1'), self.getArg('arg2'))
confInfo['result'] = resultPatched code sample
import os
import subprocess
import splunk.admin as admin
import splunk.util as util
class Mappy(admin.MConfigHandler):
def setup(self):
"""Secure function that fixes the vulnerability."""
self.supportedArgs.addOptArg('command')
self.supportedArgs.addOptArg('arg1')
self.supportedArgs.addOptArg('arg2')
def handleList(self, confInfo):
"""Secure function that fixes the vulnerability."""
allowed_commands = ['allowed_command1', 'allowed_command2']
unsafe_commands = ['os.system', 'subprocess.Popen', 'eval', 'exec']
command = self.getArg('command')
if any(unsafe_cmd in command for unsafe_cmd in unsafe_commands):
raise Exception("Unsafe command detected")
if command not in allowed_commands:
raise Exception("Unauthorized command access")
result = self.execute_command(command, self.getArg('arg1'), self.getArg('arg2'))
confInfo['result'] = result
def execute_command(self, command, arg1, arg2):
"""Secure function that fixes the vulnerability."""
safe_commands = {
'allowed_command1': f'print("Executing allowed_command1 with args: {arg1}, {arg2}")',
'allowed_command2': f'print("Executing allowed_command2 with args: {arg1}, {arg2}")',
}
if command not in safe_commands:
raise Exception("Unauthorized command execution attempt")
command_code = safe_commands[command]
exec(command_code)Cite this entry
@misc{vaitp:cve20114642,
title = {{Splunk 4.2.x mappy.py allows remote code execution by authenticated admins via CSRF (SPL-45172)}},
author = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
year = {2012},
note = {VAITP Python Vulnerability Dataset, entry CVE-2011-4642},
howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2011-4642/}}
}
Introducing the "VAITP dataset": a specialized repository of Python vulnerabilities and patches, meticulously compiled for the use of the security research community. As Python's prominence grows, understanding and addressing potential security vulnerabilities become crucial. Crafted by and for the cybersecurity community, this dataset offers a valuable resource for researchers, analysts, and developers to analyze and mitigate the security risks associated with Python. Through the comprehensive exploration of vulnerabilities and corresponding patches, the VAITP dataset fosters a safer and more resilient Python ecosystem, encouraging collaborative advancements in programming security.
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