CVE-2021-4034 vulnerability in Polkitproject and Other Products
Published on January 28, 2022
Known Exploited Vulnerability
This Red Hat Polkit Out-of-Bounds Read and Write Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability which allows for privilege escalation with administrative rights.
The following remediation steps are recommended / required by July 18, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2021-4034 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 a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2021-4034 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2021-4034
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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.