CVE-2023-30697

Vulnerability

The vulnerability resides in the IpcTxCfgSetSimlockPayload function within libsec-ril on Samsung devices. An improper input validation allows an attacker to trigger an out-of-bounds write. Affected versions are those prior to the SMR Aug-2023 Release 1 (security update released August 2023). [1]

Exploitation

An attacker requires local access to the device, likely with some level of privilege to interact with the RIL (Radio Interface Layer). The attacker can craft a malicious input to IpcTxCfgSetSimlockPayload that bypasses validation, leading to a write beyond the allocated buffer. No user interaction is needed beyond the attacker's ability to send the crafted payload.

Impact

Successful exploitation results in an out-of-bounds write, which can corrupt memory. This could lead to denial of service, information disclosure, or potentially arbitrary code execution depending on the memory layout. The attacker gains the ability to write data outside the intended buffer, compromising system stability and security.

Mitigation

Samsung has addressed this vulnerability in the SMR Aug-2023 Release 1 security update. Users should apply the latest firmware update from Samsung. No workarounds are available; updating is the only mitigation. [1]