^{CVE-2023-26075:}Intra-object overflow vulnerability in Samsung Exynos chipsets and modems due to insufficient validation when processing 5G MM messages.

Overview

This vulnerability exists in the baseband processor of various Samsung Exynos chipsets and modems. The baseband processor handles cellular communications and is a critical component in mobile devices. The vulnerability specifically affects the 5G MM (Mobility Management) message codec component when it processes Service Area List information. Due to insufficient validation of parameters, an attacker could potentially trigger an intra-object overflow, which could lead to memory corruption and possibly remote code execution. This is particularly concerning as the vulnerability could potentially be exploited remotely over cellular networks without requiring user interaction, allowing attackers to compromise affected devices simply by sending malicious network packets.

Remediation

1. Device manufacturers using affected Samsung Exynos chipsets should apply security patches provided by Samsung.
2. End users should ensure their devices are updated with the latest security patches from their device manufacturers.
3. Network operators should implement filtering mechanisms to detect and block potentially malicious 5G MM messages.
4. If patches are not available, consider limiting the use of cellular connections on affected devices when in high-risk environments.
5. Monitor Samsung's security advisories for updates on this vulnerability at: https://semiconductor.samsung.com/support/quality-support/product-security-updates/

References

1. Google Project Zero blog post on multiple baseband remote code execution vulnerabilities: https://googleprojectzero.blogspot.com/2023/03/multiple-internet-to-baseband-remote-rce.html
2. Detailed vulnerability report on Project Zero issue tracker: https://bugs.chromium.org/p/project-zero/issues/detail?id=2398
3. Alternative issue tracker link: https://project-zero.issues.chromium.org/issues/42451537
4. Packet Storm Security advisory: http://packetstormsecurity.com/files/171387/Shannon-Baseband-NrmmMsgCodec-Intra-Object-Overflow.html
5. Samsung Semiconductor product information: https://semiconductor.samsung.com/processor/mobile-processor/
6. Samsung modem information: https://semiconductor.samsung.com/processor/modem/
7. Samsung security advisories: https://semiconductor.samsung.com/support/quality-support/product-security-updates/