Linux Kernel up to 5.1.5 clk-sunxi.c sunxi_divs_clk_setup null pointer dereference ⚔ [Disputed]

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.1.5. It has been declared as critical. This issue affects the function sunxi_divs_clk_setup of the file drivers/clk/sunxi/clk-sunxi.c. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2019-12455. Local access is required to approach this attack. No exploit exists. The real existence of this vulnerability is still doubted at the moment.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 5.1.5 (Operating System). Affected by this issue is the function sunxi_divs_clk_setup of the file drivers/clk/sunxi/clk-sunxi.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

An issue was discovered in sunxi_divs_clk_setup in drivers/clk/sunxi/clk-sunxi.c in the Linux kernel through 5.1.5. There is an unchecked kstrndup of derived_name, which might allow an attacker to cause a denial of service (NULL pointer dereference and system crash).

The weakness was disclosed 05/30/2019 (Website). The advisory is available at lists.fedoraproject.org. This vulnerability is handled as CVE-2019-12455 since 05/29/2019. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The real existence of this vulnerability is still doubted at the moment.

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

The entries VDB-135653, VDB-135721, VDB-135882 and VDB-135883 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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