CVE-2019-25008
HIGH7.5Integer Overflow/Infinite Loop in the http crate
Published: 8/25/2021Modified: 2/4/2026
Description
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 sufficiently 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.
Affected packages (3)
- crates.io/httpfrom 0, < 0.1.20
- crates.io/httpfrom 0, < 0.1.20
- crates.io/http>= 0.0.0-0, < 0.1.20
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |