CVE-2024-24420

CVE-2024-24420 is a reachable assertion vulnerability in the decode_linked_ti_ie function within Magma versions up to and including 1.8.0. Magma is an open-source software platform affected by this issue, which was published on 2025-01-21. The flaw, tied to CWE-617, enables attackers to trigger a Denial of Service (DoS) condition through a crafted NAS packet. It carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

The vulnerability can be exploited by any unauthenticated attacker with network access to the affected Magma instance, requiring low attack complexity and no user interaction. By sending a specially crafted NAS packet to the vulnerable decode_linked_ti_ie function, the attacker triggers a reachable assertion, causing the service to crash and disrupting availability without impacting confidentiality or integrity.

Mitigation is available in Magma v1.9 through commit 08472ba98b8321f802e95f5622fa90fec2dea486, which addresses the assertion failure. Security practitioners should upgrade to this fixed version. Additional details are provided in the advisory at https://cellularsecurity.org/ransacked.