Headline
GHSA-qwhm-h7v3-mrjx: 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.
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
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
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2023-33192
Improper handling of NTS cookie length that could crash the ntpd-rs server
Package
cargo ntpd (Rust)
Affected versions
>= 0.3.0, < 0.3.3
Description
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.
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
There is no known workaround. Users are recommended to upgrade ntpd-rs as soon as possible.
References
pendulum-project/ntpd-rs#752
We would like to thank @mlichvar for identifying this issue
References
- GHSA-qwhm-h7v3-mrjx
- pendulum-project/ntpd-rs#752
- https://github.com/pendulum-project/ntpd-rs/releases/tag/v0.3.3
Published to the GitHub Advisory Database
May 25, 2023
Severity
CVSS base metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GHSA ID
GHSA-qwhm-h7v3-mrjx
Source code
Related news
ntpd-rs is an NTP implementation written in Rust. 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. 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.