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ac125ee29a
As proposed in #240 and tracked in #414, this PR translates all advisories into the new "V3" advisory format, which is based on Markdown with leading TOML front matter. This format makes it easier to see rendered Markdown syntax descriptions, whether rendered by an IDE or GitHub. This should help with both crafting advisories initially as well as review, and ideally encourages more lengthy descriptions. Support for this format shipped in `cargo-audit` v0.12.0 on May 6th, 2020.
30 lines
921 B
Markdown
30 lines
921 B
Markdown
```toml
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[advisory]
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id = "RUSTSEC-2019-0033"
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package = "http"
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aliases = ["CVE-2020-25574"]
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categories = ["denial-of-service"]
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date = "2019-11-16"
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keywords = ["http", "integer-overflow", "DoS"]
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url = "https://github.com/hyperium/http/issues/352"
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[affected.functions]
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"http::header::HeaderMap::reserve" = ["< 0.1.20"]
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[versions]
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patched = [">= 0.1.20"]
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```
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# Integer Overflow in HeaderMap::reserve() can cause Denial of Service
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`HeaderMap::reserve()` used `usize::next_power_of_two()` to calculate the increased capacity.
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However, `next_power_of_two()` silently overflows to 0 if given a sufficently large number
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in release mode.
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If the map was not empty when the overflow happens,
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the library will invoke `self.grow(0)` and start infinite probing.
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This allows an attacker who controls the argument to `reserve()`
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to cause a potential denial of service (DoS).
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The flaw was corrected in 0.1.20 release of `http` crate.
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