CVE-2021-36367 : Vulnerability Insights and Analysis
Learn about CVE-2021-36367, a PuTTY vulnerability allowing an attacker to manipulate SSH authentication processes, leading to unauthorized credential capture.
PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt that the attacker can use to capture credential data, leading to potential unauthorized use.
Understanding CVE-2021-36367
This section will provide insights into the details and impact of CVE-2021-36367.
What is CVE-2021-36367?
CVE-2021-36367 highlights a vulnerability in PuTTY versions up to 0.75, allowing an attacker to manipulate the SSH authentication process, potentially leading to the unauthorized capture of user credentials.
The Impact of CVE-2021-36367
The impact of this CVE lies in the ability of an attacker to set up a deceptive SSH authentication prompt, tricking users into disclosing sensitive authentication data for malicious purposes.
Technical Details of CVE-2021-36367
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability in PuTTY enables an attacker to present a spoofed authentication prompt to users, facilitating credential harvesting.
Affected Systems and Versions
All PuTTY versions up to 0.75 are affected by this vulnerability, putting users of these versions at risk of credential exposure.
Exploitation Mechanism
By leveraging this flaw, threat actors can present fake authentication prompts to PuTTY users, leading to the unauthorized collection of login credentials.
Mitigation and Prevention
Explore the measures to mitigate the risks posed by CVE-2021-36367.
Immediate Steps to Take
Users should refrain from using affected versions of PuTTY and consider alternative SSH clients with the latest security enhancements.
Long-Term Security Practices
Implementing robust security practices, such as user education on phishing attacks, can enhance overall cybersecurity posture and mitigate similar threats.
Patching and Updates
It is crucial to apply patches provided by PuTTY to address the vulnerability and prevent potential credential exposure.