Headline
GHSA-v829-x6hh-cqfq: Crossplane-runtime contains Improper Input Validation via Compositions
Summary
Fuzz testing, by Ada Logics and sponsored by the CNCF, identified a vulnerability in the fieldpath package from crossplane/crossplane-runtime that an already highly privileged Crossplane user able to create or update Compositions could leverage to cause an out of memory panic in Crossplane.
Details
Compositions allow users to specify patches inserting elements into arrays at an arbitrary index. When a Composition is selected for a Composite Resource, patches are evaluated and if a specified index is greater than the current size of the target slice, that slice’s size will be increased to the specified index, which could lead to an excessive amount of memory usage and therefore the Pod being OOM-Killed. The index is already capped to the maximum value for a uint32 (4294967295) when parsed, but that is still an unnecessarily large value.
Workaround
Users can restrict write privileges on Compositions to only admin users as a workaround.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2023-27484
Crossplane-runtime contains Improper Input Validation via Compositions
Moderate severity GitHub Reviewed Published Mar 9, 2023 in crossplane/crossplane • Updated Mar 10, 2023
Package
gomod github.com/crossplane/crossplane (Go)
Affected versions
< 1.9.2
>= 1.10.0, < 1.10.3
>= 1.11.0, < 1.11.2
Patched versions
1.9.2
1.10.3
1.11.2
Summary
Fuzz testing, by Ada Logics and sponsored by the CNCF, identified a vulnerability in the fieldpath package from crossplane/crossplane-runtime that an already highly privileged Crossplane user able to create or update Compositions could leverage to cause an out of memory panic in Crossplane.
Details
Compositions allow users to specify patches inserting elements into arrays at an arbitrary index. When a Composition is selected for a Composite Resource, patches are evaluated and if a specified index is greater than the current size of the target slice, that slice’s size will be increased to the specified index, which could lead to an excessive amount of memory usage and therefore the Pod being OOM-Killed. The index is already capped to the maximum value for a uint32 (4294967295) when parsed, but that is still an unnecessarily large value.
Workaround
Users can restrict write privileges on Compositions to only admin users as a workaround.
References
- GHSA-v829-x6hh-cqfq
- https://nvd.nist.gov/vuln/detail/CVE-2023-27484
Published by the National Vulnerability Database
Mar 9, 2023
Published to the GitHub Advisory Database
Mar 10, 2023
Last updated
Mar 10, 2023
Related news
crossplane-runtime is a set of go libraries used to build Kubernetes controllers in Crossplane and its related stacks. In affected versions an already highly privileged user able to create or update Compositions can specify an arbitrarily high index in a patch's `ToFieldPath`, which could lead to excessive memory usage once such Composition is selected for a Composite resource. Compositions allow users to specify patches inserting elements into arrays at an arbitrary index. When a Composition is selected for a Composite Resource, patches are evaluated and if a specified index is greater than the current size of the target slice, Crossplane will grow that slice up to the specified index, which could lead to an excessive amount of memory usage and therefore the Pod being OOM-Killed. The index is already capped to the maximum value for a uint32 (4294967295) when parsed, but that is still an unnecessarily large value. This issue has been addressed in versions 1.11.2, 1.10.3, and 1.9.2. Use...