Linux Kernel up to 5.3.13 cpia2_core.c cpia2_remap_buffer integer overflow

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 5.3.13. Affected by this vulnerability is the function cpia2_remap_buffer of the file drivers/media/usb/cpia2/cpia2_core.c. The manipulation leads to integer overflow. This vulnerability is uniquely identified as CVE-2019-18675. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.3.13 (Operating System). It has been rated as critical. This issue affects the function cpia2_remap_buffer of the file drivers/media/usb/cpia2/cpia2_core.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Linux kernel through 5.3.13 has a start_offset+size Integer Overflow in cpia2_remap_buffer in drivers/media/usb/cpia2/cpia2_core.c because cpia2 has its own mmap implementation. This allows local users (with /dev/video0 access) to obtain read and write permissions on kernel physical pages, which can possibly result in a privilege escalation.

The weakness was disclosed 11/25/2019. The identification of this vulnerability is CVE-2019-18675 since 11/03/2019. Attacking locally is a requirement. A simple authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/27/2024).

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

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.3.0
• 5.3.1
• 5.3.2
• 5.3.3
• 5.3.4
• 5.3.5
• 5.3.6
• 5.3.7
• 5.3.8
• 5.3.9
• 5.3.10
• 5.3.11
• 5.3.12
• 5.3.13

License

• open-source

Website

• Vendor: https://www.kernel.org/

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