title: Unlimited resource allocation by QUIC CRYPTO frames flooding in quiche
description: Cloudflare Quiche (through version 0.19.1/0.20.0) was affected by an unlimited resource allocation vulnerability causing rapid increase of memory usage of the system running quiche server or client.
A remote attacker could take advantage of this vulnerability by repeatedly sending an unlimited number of 1-RTT CRYPTO frames after previously completing the QUIC handshake.
Exploitation was possible for the duration of the connection which could be extended by the attacker.
quiche 0.19.2 and 0.20.1 are the earliest versions containing the fix for this issue.
problem types: CWE-400 Uncontrolled Resource Consumption
affected:
{
defaultStatus: unaffected
packageName: quiche
platforms: Rust
product: quiche
vendor: Cloudflare
versions:
lessThanOrEqual: <0.19.1, status: affected, version: 0.15.0, versionType: semver
lessThan: <0.20.1, status: affected, version: 0.20.0, versionType: semver
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 5.9
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL