CVE-2023-33192— Improper handling of NTS cookie length that could crash the ntpd-rs server
Quick assessment
Affected
pendulum-project ntpd-rs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
ntpd-rs是网络时间协议的全功能实现，包括 NTS 支持。 ntpd-rs 0.3.0到0.3.2版本存在安全漏洞，该漏洞源于ntpd-rs 不验证接收到服务器的 NTP 数据包中 NTS cookie 的长度，攻击者利用该漏洞可以通过发送特制 NTP 数据包来使服务器崩溃。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-33192
Vulnerability Information
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Vulnerability Title
Improper handling of NTS cookie length that could crash the ntpd-rs server
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
ntpd-rs 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ntpd-rs是网络时间协议的全功能实现，包括 NTS 支持。 ntpd-rs 0.3.0到0.3.2版本存在安全漏洞，该漏洞源于ntpd-rs 不验证接收到服务器的 NTP 数据包中 NTS cookie 的长度，攻击者利用该漏洞可以通过发送特制 NTP 数据包来使服务器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| pendulum-project | ntpd-rs | >= 0.3.0, < 0.3.3 | - |
|
II. Public POCs for CVE-2023-33192
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2023-33192 (1)
-
https://github.com/pendulum-project/ntpd-rs/pull/752 x_refsource_MISC
Vendor Advisories for CVE-2023-33192 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2023-33192
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