CVE-2024-43167 Information

Description

A NULL pointer dereference flaw was found in the ub_ctx_set_fwd function in Unbound. This issue could allow an attacker who can invoke specific sequences of API calls to cause a segmentation fault. When certain API functions such as ub_ctx_set_fwd and ub_ctx_resolvconf are called in a particular order the program attempts to read from a NULL pointer leading to a crash. This issue can result in a denial of service by causing the application to terminate unexpectedly.

Reference

https://access.redhat.com/security/cve/CVE-2024-43167 https://bugzilla.redhat.com/show_bug.cgi?id=2303456 https://github.com/NLnetLabs/unbound/issues/1072 https://github.com/NLnetLabs/unbound/pull/1073/files