Multisite DoS through unsanitized dynamic dispatch to SiteSetting
Package
No package listed
Affected versions
stable <= 3.0.1; beta <= 3.1.0.beta2; tests-passed <= 3.1.0.beta2
Patched versions
stable > 3.0.1; beta > 3.1.0.beta2; tests-passed > 3.1.0.beta2
Impact
A user logged as an administrator can call arbitrary methods on the
SiteSettingclass, notably#clear_cache!and#notify_changed!, which when done on a multisite, can affect the entire cluster.Patches
This issue is patched in the latest stable, beta and tests-passed versions of Discourse.
Workarounds
None.