title: Out of Bounds Slice index in cfnts leads to remote panic
description: An unchecked read in NTP server in github.com/cloudflare/cfnts prior to commit  783490b https://github.com/cloudflare/cfnts/commit/783490b913f05e508a492cd7b02e3c4ec2297b71  enabled a remote attacker to trigger a panic by sending an NTSAuthenticator packet with extension length longer than the packet contents.
problem types: CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
affected:
{
collectionURL: https://github.com
defaultStatus: unaffected
packageName: cfnts
platforms: rust
product: cfnts
vendor: Cloudflare
versions:
lessThan: < 783490b, status: affected, version: 0, versionType: git
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL