BUGFIX: don't allocate more memory than what can be read from io.Reader#42
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johnweldon merged 1 commit intogo-asn1-ber:masterfrom Apr 22, 2024
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inteon
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Apr 10, 2024
| // make([]byte, length) can allocate up to MaxPacketLengthBytes which is | ||
| // currently 2 GB. This can cause memory related crashes when fuzzing in | ||
| // parallel or on memory constrained devices. | ||
| MaxPacketLengthBytes = 65536 |
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This PR fixes the issue described above.
…ength of the io.Reader, causing potential DOS due to unexpected high memory usage (max MaxPacketLengthBytes) Signed-off-by: Tim Ramlot <[email protected]>
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I replaced |
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@johnweldon PTAL |
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@johnweldon Thanks for merging the PR, can this be a 1.5.6 release? |
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Memory was allocated based on encoded length instead of the length of the io.Reader.
This makes it possible for an attacker to cause DOS due to unexpected high memory usage (max MaxPacketLengthBytes) with a reader is actually limited in length.