Unexexploited Vulnerability Affects Confluence Data Center and Server, Leading to Full Loss of Confidentiality, Integrity, and Availability
Key Information
- Vendor
- Atlassian
- Status
- Confluence Data Center
- Confluence Server
- Vendor
- CVE Published:
- 31 October 2023
Badges
Summary
The vulnerability CVE-2023-22518 affects the Confluence Data Center and Server software by Atlassian, allowing an attacker to create a backdoor administrator account and gain full control over the system. This vulnerability has been actively exploited by threat actors to deploy C3RB3R ransomware on both Windows and Linux hosts. The exploitation involves initial compromise via a specially-crafted HTTP-POST command and subsequent deployment of the ransomware payload. Atlassian has released a patch for this vulnerability, and organizations are urged to apply the patch promptly. Numerous indicators of compromise have been identified, including specific IP addresses used for payload delivery and the appearance of malicious webshell plugins. The exploitation of this vulnerability presents a significant risk, potentially resulting in data encryption, data exfiltration, and financial extortion. It is crucial for organizations to implement security controls and apply patches to protect against such threats.
CISA Reported
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2023-22518 as being exploited and is known by the CISA as enabling ransomware campaigns.
The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected Version(s)
Confluence Data Center >= 1.0.0
Confluence Data Center < 1.0.0
Confluence Data Center >= 7.19.16
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
News Articles
Atlassian Confluence Linux instances targeted with Cerber ransomware
Attackers exploited a critical vulnerability to create a new administrator account.
8 months ago
Security Affairs CVE-2023-22518Linux variant of Cerber ransomware targets Atlassian servers
Threat actors are exploiting the CVE-2023-22518 flaw in Atlassian servers to deploy a Linux variant of Cerber (aka C3RB3R) ransomware.
8 months ago
SentinelOne CVE-2023-22518C3RB3R Ransomware | Ongoing Exploitation of CVE-2023-22518 Targets Unpatched Confluence Servers
Learn how threat actors are exploiting Confluence CVE-2023-22518 to deploy Cerber ransomware on Linux and Windows hosts.
1 year ago
EPSS Score
96% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 👾
Exploit exists.
First article discovered by The Register
Vulnerability published.
Vulnerability Reserved.