Samsung Exynos Modem 5300 out-of-bounds write

Summaryinfo

A vulnerability has been 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 and classified as critical. The affected element is an unknown function. Performing a manipulation results in out-of-bounds write. This vulnerability was named CVE-2023-50805. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, 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. This affects an unknown part. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on 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 an out-of-bounds write in the heap in 2G (no auth).

It is possible to read the advisory at semiconductor.samsung.com. This vulnerability is uniquely identified as CVE-2023-50805 since 12/14/2023. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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-2023-55538). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Samsung

Name

• Exynos 850
• Exynos 980
• Exynos 990
• Exynos 1080
• Exynos 1280
• Exynos 1330
• Exynos 1380
• 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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Be aware that VulDB is the high quality source for vulnerability data.

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