Fuzz testing, by Ada Logics and sponsored by the CNCF, identified input to functions in the _repo_ package that can cause a segmentation violation. Applications that use functions from the _repo_ package in the Helm SDK can have a Denial of Service attack when they use this package and it panics.
Impact
The _repo_ package contains a handler that processes the index file of a repository. For example, the Helm client adds references to chart repositories where charts are managed. The _repo_ package parses the index file of the repository and loads it into structures Go can work with. Some index files can cause array data structures to be created causing a memory violation.
Applications that use the _repo_ package in the Helm SDK to parse an index file can suffer a Denial of Service when that input causes a panic that cannot be recovered from.
The Helm Client will panic with an index file that causes a memory violation panic. Helm is not a long running service so the panic will not affect future uses of the Helm client.
Patches
This issue has been resolved in 3.10.3.
Workarounds
SDK users can validate index files that are correctly formatted before passing them to the _repo_ functions.
For more information
Helm's security policy is spelled out in detail in our SECURITY document.
Credits
Disclosed by Ada Logics in a fuzzing audit sponsored by CNCF.
References
AdamKorcz Analyst
DavidKorczynski Analyst
Fuzz testing, by Ada Logics and sponsored by the CNCF, identified input to functions in the
_repo_package that can cause a segmentation violation. Applications that use functions from the_repo_package in the Helm SDK can have a Denial of Service attack when they use this package and it panics.Impact
The
_repo_package contains a handler that processes the index file of a repository. For example, the Helm client adds references to chart repositories where charts are managed. The_repo_package parses the index file of the repository and loads it into structures Go can work with. Some index files can cause array data structures to be created causing a memory violation.Applications that use the
_repo_package in the Helm SDK to parse an index file can suffer a Denial of Service when that input causes a panic that cannot be recovered from.The Helm Client will panic with an index file that causes a memory violation panic. Helm is not a long running service so the panic will not affect future uses of the Helm client.
Patches
This issue has been resolved in 3.10.3.
Workarounds
SDK users can validate index files that are correctly formatted before passing them to the
_repo_functions.For more information
Helm's security policy is spelled out in detail in our SECURITY document.
Credits
Disclosed by Ada Logics in a fuzzing audit sponsored by CNCF.
References