CVE-2021-3156 vulnerability in NetApp and Other Products
Published on January 26, 2021
Known Exploited Vulnerability
This Sudo Heap-Based Buffer Overflow Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Sudo contains an off-by-one error that can result in a heap-based buffer overflow, which allows for privilege escalation.
The following remediation steps are recommended / required by April 27, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2021-3156 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is an off-by-five Vulnerability?
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
CVE-2021-3156 has been classified to as an off-by-five vulnerability or weakness.
Products Associated with CVE-2021-3156
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-3156 are published in these products:
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.