#VU67867 Integer overflow in Google Android - CVE-2022-20423

Vulnerability identifier: #VU67867

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-20423

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Google Android
Operating systems & Components / Operating system

Vendor: Google

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to integer overflow within the rndis_set_response() function in drivers/usb/gadget/function/rndis.c in Linux kernel. A local application can trigger ab integer overflow and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Google Android: before 10, 11, 12L, 12, 13, 10

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External links
https://source.android.com/docs/security/bulletin/2022-10-01#2022-10-05-security-patch-level-vulnerability-details
https://android.googlesource.com/kernel/common/+/0a21a3eb9fcea0609f3bc8bee1f796788e0a770e
https://android.googlesource.com/kernel/common/+/28bc0267399f4
https://lore.kernel.org/all/20220301080424.GA17208@kili/

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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.