Samsung Exynos Modem 5300 SIM Proactive Command heap-based overflow

Summaryinfo

A vulnerability was found in Samsung Exynos 9820, Exynos 9825, Exynos 980, Exynos 990, Exynos 850 Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380 Exynos 1330, Exynos 9110, Exynos W920, Exynos W930, Exynos Modem 5123 and Exynos Modem 5300. It has been rated as critical. Affected is an unknown function of the component SIM Proactive Command Handler. This manipulation causes heap-based overflow. This vulnerability is tracked as CVE-2023-50806. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability was found in Samsung Exynos 9820, Exynos 9825, Exynos 980, Exynos 990, Exynos 850 Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380 Exynos 1330, Exynos 9110, Exynos W920, Exynos W930, Exynos Modem 5123 and Exynos Modem 5300. It has been declared as critical. Affected by this vulnerability is an unknown function of the component SIM Proactive Command Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability was discovered in Samsung Mobile Processor, Wearable Processor, and Modems with versions Exynos 9820, Exynos 9825, Exynos 980, Exynos 990, Exynos 850 Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380 Exynos 1330, Exynos 9110, Exynos W920, Exynos W930, Exynos Modem 5123, Exynos Modem 5300 that allows out-of-bounds access to a heap buffer in the SIM Proactive Command.

It is possible to read the advisory at semiconductor.samsung.com. This vulnerability is known as CVE-2023-50806 since 12/14/2023. The exploitation appears to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/05/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-55539). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Samsung

Name

• Exynos 850 Exynos 1080
• Exynos 980
• Exynos 990
• Exynos 1280
• Exynos 1380 Exynos 1330
• Exynos 2100
• Exynos 2200
• Exynos 9110
• Exynos 9820
• Exynos 9825
• Exynos Modem 5123
• Exynos Modem 5300
• Exynos W920
• Exynos W930

License

• commercial

Website

• Vendor: https://www.samsung.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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