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Enforce limits of values read from incoming headers and app id lookup #608
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…nary(). Added Common classes and methods to support changes.
…as several protection including preventing unlimited retries etc
cijothomas
commented
Feb 27, 2018
| /// <summary> | ||
| /// Max length of context header key. | ||
| /// </summary> | ||
| public const int ContextHeaderKeyMaxLength = 50; |
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i picked 50. Not sure if there is genuine need of key longer than this.
cijothomas
commented
Feb 27, 2018
| /// <summary> | ||
| /// Max length of context header value. | ||
| /// </summary> | ||
| public const int ContextHeaderValueMaxLength = 100; |
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i picked 100. Not sure if there is genuine need of a value longer than this.
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@SergeyKanzhelev's guidance for WebSDK was to allow up to 1Kb. I made the same change above to RequestHeaderMaxLengeth.
Consider if that is appropriate for here as well.
|
I'm approving these changes. Most everything was copied verbatim from microsoft/ApplicationInsights-dotnet-server#810 |
TimothyMothra
approved these changes
Feb 28, 2018
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Addresses security concerns about malicious user attempting to send request with unreasonably large request headers. As SDK reads these values and stores locally/make part of Telemetry items, they can cause undesirable effects like high mem/cpu/ etc.
This attempts to enforce limits on values read from outside requests/responses.
For significant contributions please make sure you have completed the following items:
Changes in public surface reviewed
Design discussion issue #
CHANGELOG.md updated with one line description of the fix, and a link to the original issue.
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