CVE-2023-33192
An attacker can crash the server by sending a specially crafted NTP packet containing a cookie shorter than what the server expects.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.71% probability · 51th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-130
- Affected
- tweedegolf/ntpd-rs
- Source
- security-advisories@github.com
References
- https://github.com/pendulum-project/ntpd-rs/pull/752Patch
- https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjxMitigation, Vendor Advisory
- https://github.com/pendulum-project/ntpd-rs/pull/752Patch
- https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjxMitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.