Information disclosure in Linux kernel i2c busses driver

1) Information disclosure

EUVDB-ID: #VU91404

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36782

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to information disclosure within the lpi2c_imx_master_enable() function in drivers/i2c/busses/i2c-imx-lpi2c.c. A local user can gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4 - 5.13 rc5

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.0:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.7:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/815859cb1d2302e74f11bf6894bceace9ca9eb4a
https://git.kernel.org/stable/c/cc49d206414240483bb93ffa3d80243e6a776916
https://git.kernel.org/stable/c/bb300acc867e937edc2a6898e92b21f88e4e4e66
https://git.kernel.org/stable/c/b100650d80cd2292f6c152f5f2943b5944b3e8ce
https://git.kernel.org/stable/c/278e5bbdb9a94fa063c0f9bcde2479d0b8042462
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.119

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.