CVE-2021-33555 : What You Need to Know
Discover the details of CVE-2021-33555 affecting PEPPERL+FUCHS WirelessHART-Gateway, allowing unauthorized users to read arbitrary files on the server. Learn about the impact, affected versions, and mitigation steps.
A vulnerability has been identified in PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.7, allowing remote attackers to read arbitrary files on the server through unauthenticated path traversal attacks.
Understanding CVE-2021-33555
This section will provide insights into the nature and impact of the CVE-2021-33555 vulnerability.
What is CVE-2021-33555?
The vulnerability in PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.7 arises from the filename parameter that is susceptible to unauthenticated path traversal attacks. This flaw enables unauthorized users to gain read access to any file on the server.
The Impact of CVE-2021-33555
With a CVSS v3.1 base score of 7.5 and a high severity level, this vulnerability poses a significant risk to confidentiality, allowing attackers to access sensitive information without proper authentication.
Technical Details of CVE-2021-33555
Delve deeper into the specifics of CVE-2021-33555, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability allows remote attackers to read files on the server of the WirelessHART-Gateway, exploiting the unauthenticated path traversal issue in version 3.0.7 and below.
Affected Systems and Versions
The impacted products include 'WHA-GW-F2D2-0-AS- Z2-ETH' and 'WHA-GW-F2D2-0-AS- Z2-ETH.EIP' by Phoenix Contact with a version equal to or less than 3.0.7.
Exploitation Mechanism
Attackers can exploit this vulnerability over a network with low complexity and no prior privileges required, compromising the confidentiality of data with a direct impact on users.
Mitigation and Prevention
Explore the essential steps to mitigate the risks associated with CVE-2021-33555 and prevent any potential exploitation.
Immediate Steps to Take
Implement external protective measures such as minimizing network exposure, isolating affected products, and using secure remote access methods like VPNs.
Long-Term Security Practices
Establish a robust security posture by regularly updating and patching affected systems, conducting security audits, and enhancing access control measures.
Patching and Updates
As of now, there is no available update to address the vulnerability in PEPPERL+FUCHS WirelessHART-Gateway <= 3.0.7.