artifact: protect against unbounded artifact decompression (1.5.0) #16151
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shoenig
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Starting with 1.5.0, set defaut values for artifact decompression limits. artifact.decompression_size_limit (default "100GB") - the maximum amount of data that will be decompressed before triggering an error and cancelling the operation artifact.decompression_file_count_limit (default 4096) - the maximum number of files that will be decompressed before triggering an error and cancelling the operation.
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tgross
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Feb 13, 2023
| @@ -166,6 +186,22 @@ func (a *ArtifactConfig) Validate() error { | |||
| return fmt.Errorf("s3_timeout must be > 0") | |||
| } | |||
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| if a.DecompressionFileCountLimit == nil { | |||
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Can this value (and DecompressionSizeLimit on line 192) ever be nil in 1.5.0? If it's not set in the user's configuration, we should be falling back to the default value. Is this just belt-and-suspenders against a NPE when we ParseBytes later?
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Indeed it "can't" ever be nil because we only create one of these from a DefaultConfig() helper; the validation here should not set a default at all I think, and simply fail the validation if the value is nil.
Good catch!
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This is a forward-port of #16126.
Targets main/1.5.0 only.
Starting with 1.5.0, we set default values for artifact decompression limits.
Note: these limits simply "seem reasonable". Download sizes are already limited to 100GB by default, and 4096 seems like enough files for most use cases without being unbounded.