CVE-2021-25741 (GCVE-0-2021-25741)
Vulnerability from cvelistv5 – Published: 2021-09-20 17:05 – Updated: 2024-09-16 23:26
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-20 13:25 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://groups.google.com/g/kubernetes-security-a… | x_refsource_MISC |
| https://github.com/kubernetes/kubernetes/issues/104980 | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021100… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| 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) |
guessed | |
| 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:*:*:*:*:*:*:*:* |
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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