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CVE-2020-8570

Kubernetes Java client libraries unvalidated path traversal in Copy implementation

CRITICAL
9.1
CVSS Score
Published: January 21, 2021 at 05:09 PM UTC
Updated: June 17, 2026 at 03:26 AM UTC
1 product affected across 1 vendorJava

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Severity
CRITICAL9.1
Exploit prediction
EPSS 4%

Description

Kubernetes Java client libraries in version 10.0.0 and versions prior to 9.0.1 allow writes to paths outside of the current directory when copying multiple files from a remote pod which sends a maliciously crafted archive. This can potentially overwrite any files on the system of the process executing the client code.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Java· Kubernetes
95%
v < 9.0v < 9.0.210.0 ≤ v < 10.0.110.0.0 ≤ v < 10.0.19.0 ≤ v < 9.0.210.09.0
Affected range stops below 10.0.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://github.com/kubernetes-client/java/issues/1491
x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
https://groups.google.com/g/kubernetes-security-announce/c/sd5h73sFPrg
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E

CVSS

9.1CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-23CWE-22

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