CVE-2023-3036

Out of Bounds Slice index in cfnts leads to remote panic

State: Published
Severity: 8.6 High
Published: Jun 14, 2023
Updated: Jan 2, 2025
Reserved: Jun 1, 2023

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.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	cloudflare

Weaknesses

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
cfntsCloudflare	before < 783490bAffected

References

https://github.com/cloudflare/cfnts/security/advisories/GHSA-pwx6-gw47-96cp

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