> CVE-2023-32886: Mediatek Baseband Buffer Overflow During Handling SIP Multipart Messages

An attacker sending a malformed SIP message over VoLTE to a device with a Mediatek baseband can trigger the vulnerability described here. The impact is Heap Overflow in the baseband, triggered by malformed multipart SIP messages containing SMS data. The vulnerability described in this advisory affected a wide range of Mediatek devices. The January 2024 issue of the Mediatek Security Bulletin contains this vulnerability as CVE-2023-32886. Vulnerability Details SIP supports the processing of multipart requests (as described in RFC 1341), where a single message can contain multiple body parts, with different content type. In these messages each body fragment is separated by a boundary tag, that is defined in the boundary parameter of the Content-Type MIME header.