[Security] Bump http from 0.1.18 to 0.1.21

[dependabot-preview]

Bumps http from 0.1.18 to 0.1.21. This update includes security fixes.

Vulnerabilities fixed

Sourced from The RustSec Advisory Database.

HeaderMap::Drain API is unsound Affected versions of this crate incorrectly used raw pointer, which introduced unsoundness in its public safe API.

Failing to drop the Drain struct causes double-free, and it is possible to violate Rust's alias rule and cause data race with Drain's Iterator implementation.

The flaw was corrected in 0.1.20 release of http crate.

Patched versions: >= 0.1.20 Unaffected versions: none

Sourced from The RustSec Advisory Database.

Integer Overflow in HeaderMap::reserve() can cause Denial of Service HeaderMap::reserve() used usize::next_power_of_two() to calculate the increased capacity. However, next_power_of_two() silently overflows to 0 if given a sufficently large number in release mode.

If the map was not empty when the overflow happens, the library will invoke self.grow(0) and start infinite probing. This allows an attacker who controls the argument to reserve() to cause a potential denial of service (DoS).

The flaw was corrected in 0.1.20 release of http crate.

Patched versions: >= 0.1.20 Unaffected versions: none

Changelog

Sourced from http's changelog.

0.1.21 (December 2, 2019)

• Fix Method::is_idempotent returning false for PUT and `DELETE.

0.1.20 (November 26, 2019)

• Fix possible double-free if header::Drain iterator is std::mem::forgoten (#357).
• Fix possible data race if multiple header::ValueDrains are iterated on different threads (#362).
• Fix HeaderMap::reserve capacity overflows (#360).
• Fix parsing long authority-form Uris (#351).

0.1.19 (October 15, 2019)

• Allow % in IPv6 addresses in Uri (#343).

Commits

• 6443bdb v0.1.21
• 0cbcc1e Fix Method::is_idempotent
• 4a5b64d v0.1.20
• 6b07ee4 Refactor Method::is_idempotent for readability (#348)
• 6856193 Fix docs indentation (#347)
• d3cae7c Fix parsing of long host with no scheme (#351)
• 8ffe094 Make ValueDrain eagerly collect its extra values
• 81ceb61 fix capacity overflows in HeaderMap::reserve
• 32f1ae1 Remove unused 'inner label
• 82d53db Fix HeaderMap::drain double-free if drain iterator is forgotten
• Additional commits viewable in compare view

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