Allocation of Resources Without Limits or Throttling Affecting ntpd package, versions >=0.3.1 <1.1.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Jun 2024
- disclosed28 Jun 2024
- creditUnknown
Introduced: 28 Jun 2024
CVE-2024-38528 (opens in a new tab)How to fix?
Upgrade ntpd to version 1.1.3 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the accept system call. An attacker can cause the service to crash by opening a large number of TCP connections rapidly enough to exceed system resource limits before the key-exchange-timeout-ms timeout occurs. This is only exploitable if the server is configured as an NTS-KE server; default configurations are unaffected.
Workaround
This vulnerability can be mitigated by disabling NTS-KE server functionality, increasing system resource limits (RLIMIT_NOFILE), or lowering the key-exchange-timeout-ms configuration setting to make the attack more difficult