CVE-2021-25741 is a vulnerability in Kubernetes
Published on September 20, 2021
Symlink Exchange Can Allow Host Filesystem Access
A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.
Vulnerability Analysis
CVE-2021-25741 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2021-25741
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Affected Versions
Kubernetes:- Version unspecified, <= 1.19.14 is affected.
- Version unspecified, <= 1.20.10 is affected.
- Version unspecified, <= 1.21.4 is affected.
- Version unspecified, <= 1.22.1 is affected.
- Before and including 1.19.14 is affected.
- Version 1.20.0, <= 1.20.10 is affected.
- Version 1.21.0, <= 1.21.4 is affected.
- Version 1.22.0, <= 1.22.1 is affected.
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.