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Security Advisories: GSA_kwCzR0hTQS1xd2htLWg3djMtbXJqeM4AAzeZ
Improper handling of NTS cookie length that could crash the ntpd-rs server
Impact
ntpd-rs does not validate the length of NTS cookies in received NTP packets to the server. An attacker can crash the server by sending a specially crafted NTP packet containing a cookie shorter than what the server expects. The server also crashes when it is not configured to handle NTS packets.
ntpd-rs running purely as an ntp client is not affected.
Patches
The issue was caused by improper slice indexing. The indexing operations were replaced by safer alternatives that do not crash the ntpd-rs server process but instead properly handle the error condition. A patch was released in version 0.3.3
Workarounds
ntpd-rs running purely as an ntp client is not affected. By default, ntpd-rs packages are not configured to run as a server.
For machines where serving the time is required, there is no known workaround. Users are recommended to upgrade ntpd-rs as soon as possible.
References
https://github.com/pendulum-project/ntpd-rs/pull/752
We would like to thank @mlichvar for identifying this issue
Permalink: https://github.com/advisories/GHSA-qwhm-h7v3-mrjxJSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1xd2htLWg3djMtbXJqeM4AAzeZ
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 11 months ago
Updated: 6 months ago
CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Identifiers: GHSA-qwhm-h7v3-mrjx, CVE-2023-33192
References:
- https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjx
- https://github.com/pendulum-project/ntpd-rs/pull/752
- https://github.com/pendulum-project/ntpd-rs/releases/tag/v0.3.3
- https://nvd.nist.gov/vuln/detail/CVE-2023-33192
- https://github.com/advisories/GHSA-qwhm-h7v3-mrjx
Blast Radius: 1.0
Affected Packages
cargo:ntpd
Dependent packages: 0Dependent repositories: 0
Downloads: 7,390 total
Affected Version Ranges: >= 0.3.0, < 0.3.3
Fixed in: 0.3.3
All affected versions: 0.3.1, 0.3.2
All unaffected versions: 0.1.0, 0.1.1, 0.3.3, 0.3.5, 0.3.6, 0.3.7, 1.0.0, 1.1.0, 1.1.1, 1.1.2