CVE-2021-3064 is a memory corruption vulnerability that exists in the Palo Alto Networks GlobalProtect portal and gateway interfaces. This vulnerability allows an unauthenticated network-based attacker to disrupt system processes and potentially execute arbitrary code with root privileges. The attacker must have network access to the GlobalProtect interface to exploit this issue. This vulnerability impacts PAN-OS versions before 8.1.17, while Prisma Access customers are not affected by this issue.
The severity of this vulnerability is classified as critical, with a CVSS score of 9.8. This high severity level emphasizes the potential impact on organizations, as it can lead to complete system compromise if exploited successfully. Organizations should prioritize patching immediately.
As of now, the known exploitation status for this vulnerability indicates that there is at least one public proof of concept available, which further raises the urgency for organizations to address this vulnerability within their environments.
Organizations should assess their systems for potential exposure to this vulnerability and implement necessary patches or mitigations to safeguard against potential exploitation.
Vulnerability Details
The official CVE description states that a memory corruption vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that allows an unauthenticated network-based attacker to disrupt system processes and execute arbitrary code with root privileges. This issue impacts PAN-OS versions earlier than 8.1.17.
The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow) and CWE-787 (Out-of-bounds Write). This classification signifies that the vulnerability arises from improper handling of memory operations, leading to potential exploitation opportunities.
The CVSS score for this vulnerability is 9.8, classified as critical. The attack vector is network-based, with low attack complexity, requiring no privileges or user interaction. The potential impacts include high confidentiality, integrity, and availability impacts.
Technical Analysis
The root cause of this vulnerability stems from improper memory handling within the GlobalProtect portal and gateway interfaces. The memory corruption can be exploited by an attacker with network access, allowing for disruptive actions and the potential execution of arbitrary code.
The attack vector is classified as network-based, meaning that an attacker can exploit this vulnerability from a remote location without physical access to the system. The attack complexity is considered low, as the vulnerability can be exploited without advanced techniques.
No privileges are required for exploitation, and user interaction is not necessary. The potential impacts on confidentiality, integrity, and availability are all high, indicating the severity of the threat posed by this vulnerability.
Risk & Impact Analysis
The real-world risk of this vulnerability is significant, as it allows for potential remote code execution by attackers, which can lead to unauthorized access to sensitive data and system disruption. The blast radius of an exploit may be extensive, affecting multiple systems connected to the GlobalProtect interface.
Given the CVSS score of 9.8, organizations should assess this vulnerability as a critical priority. The presence of a public proof of concept further escalates the urgency for immediate remediation efforts.
Organizations utilizing PAN-OS versions earlier than 8.1.17 must take action to mitigate the risks associated with this vulnerability. The potential for exploitation underscores the necessity for vigilance and proactive security measures.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions for this vulnerability include all PAN-OS versions prior to 8.1.17. Organizations running these versions should look for updates and ensure that they are patched to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize applying the latest patches provided by Palo Alto Networks. For PAN-OS, the version to upgrade to is 8.1.17 or later. In case the patch cannot be applied immediately, organizations should implement configuration hardening practices to minimize exposure to this vulnerability. Network controls can also be effective in limiting access to the vulnerable interfaces.
For additional guidance on vulnerability management, organizations can refer to the vulnerability management program design to ensure systematic remediation efforts.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual activity related to the GlobalProtect interface. Behavioral anomalies, such as unexpected system crashes or performance degradation, may indicate exploitation. Additionally, network signatures that correspond to known exploit patterns should be established to enhance detection capabilities.
AppSecure Threat Intelligence Insight
CVE-2021-3064 exemplifies the ongoing challenges organizations face in managing vulnerabilities within their infrastructure. The existence of a public proof of concept highlights the importance of rapid patching and the need for comprehensive vulnerability management strategies.
Security teams should leverage this vulnerability as a learning opportunity to enhance their security posture and develop proactive measures to prevent future incidents. The trend of increasing exploitation of vulnerabilities in network devices underscores the necessity for continuous security testing and assessment.
For organizations seeking to augment their security capabilities, engaging in penetration testing services can provide valuable insights into existing vulnerabilities and help prioritize remediation efforts.
Known Exploitation Timeline
As of the latest updates, there is no active exploitation reported in the KEV catalog.
EPSS Risk Context
The EPSS score of 0.4777 indicates a high percentile ranking at 97.72%, suggesting a significant probability of exploitation. Organizations should remain vigilant and prioritize mitigation efforts accordingly.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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