CVE-2021-25741 (GCVE-0-2021-25741)

Vulnerability from cvelistv5 – Published: 2021-09-20 17:05 – Updated: 2024-09-16 23:26
VLAI
Title
Symlink Exchange Can Allow Host Filesystem Access
Summary
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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Kubernetes Kubernetes Affected: unspecified , ≤ 1.19.14 (custom)
Affected: unspecified , ≤ 1.20.10 (custom)
Affected: unspecified , ≤ 1.21.4 (custom)
Affected: unspecified , ≤ 1.22.1 (custom)
Create a notification for this product.
kubernetes kubernetes Affected: 0 , ≤ 1.19.14 (custom)
Affected: 1.20.0 , ≤ 1.20.10 (custom)
Affected: 1.21.0 , ≤ 1.21.4 (custom)
Affected: 1.22.0 , ≤ 1.22.1 (custom)
    cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Fabricio Voznika & Mark Wolters
Show details on NVD website
To clipboard 

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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.