Description
OPNsense core through 26.7.8 contains a configuration injection vulnerability that allows authenticated users to append ntpd.conf directives by embedding newlines in the fudge and refid fields. Attackers holding the page-services-ntp-gps or PPS privilege can submit CR/LF characters via services_ntpd_gps.php or services_ntpd_pps.php to inject directives loaded by ntpd running as root.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
opnsense core
Default version status: unaffected
0 to ≤ 26.7.8affected
pkg:github/opnsense/coreReferences
- https://github.com/opnsense/core/blob/26.7.8/src/etc/inc/plugins.inc.d/ntpd.inc#L285-L312 ↗
- https://github.com/opnsense/core/blob/26.7.8/src/www/services_ntpd_gps.php#L49 ↗
- https://github.com/opnsense/core/security/advisories/GHSA-fq94-cxvc-9r7w ↗
- https://abraxaslabs.tech/research/opnsense-ntp-gps-fudge ↗
- https://github.com/opnsense/core ↗
- https://www.vulncheck.com/advisories/opnsense-core-through-26.7.8-ntp-configuration-injection-via-gps-and-pps-fudge-fields ↗