Samsung Galaxy S6 SM-G920F G920FXXU5EQH7 bcmdhd4358 Wi-Fi Driver dhd_linux.c dhd_rx_frame memory corruption

Summaryinfo

A vulnerability, which was classified as critical, has been found in Samsung Galaxy S6 SM-G920F G920FXXU5EQH7. Affected is the function dhd_rx_frame of the file drivers/net/wireless/bcmdhd4358/dhd_linux.c of the component bcmdhd4358 Wi-Fi Driver. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2018-14852. The attack is only possible within the local network. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Samsung Galaxy S6 SM-G920F G920FXXU5EQH7 (Smartphone Operating System). Affected by this vulnerability is the function dhd_rx_frame of the file drivers/net/wireless/bcmdhd4358/dhd_linux.c of the component bcmdhd4358 Wi-Fi Driver. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Out-of-bounds array access in dhd_rx_frame in drivers/net/wireless/bcmdhd4358/dhd_linux.c in the bcmdhd4358 Wi-Fi driver on the Samsung Galaxy S6 SM-G920F G920FXXU5EQH7 allows an attacker (who has obtained code execution on the Wi-Fi chip) to cause invalid accesses to operating system memory due to improper validation of the network interface index provided by the Wi-Fi chip's firmware.

The bug was discovered 12/11/2018. The weakness was disclosed 12/17/2018 (Website). The advisory is shared at github.com. This vulnerability is known as CVE-2018-14852 since 08/02/2018. The attack can only be done within the local network. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-128021, VDB-128020, VDB-128019 and VDB-128018 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Smartphone Operating System

Vendor

• Samsung

Name

• Galaxy S6

Version

• SM-G920F G920FXXU5EQH7

License

• commercial

Website

• Vendor: https://www.samsung.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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