CVE-2019-25008 — Integer Overflow/Infinite Loop in http — CVE Details

HIGH

Integer Overflow/Infinite Loop in the http crate

Published August 25, 2021Updated September 10, 2026Source: osv

Summary

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.

Advisory Timeline

First published August 25, 2021 (1874 days ago).
Last revised September 10, 2026 — 1841 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo

Update http to 0.1.20 or later

cargo update -p http --precise 0.1.20

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

Package	Ecosystem	Affected	Fixed In
http	crates.io	All versions	0.1.20

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-190
Integer OverflowMITRE
CWE-835
View on MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2019-25008?: Integer Overflow/Infinite Loop in the http crate This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2019-25008?: CVE-2019-25008 affects http. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2019-25008 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-x7vr-c387-8w57

CVE-2020-25574

GHSA-xvc9-xwgj-4cq9

RUSTSEC-2019-0033

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