Vulnerability identifier: #VU76224

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-21102

CWE-ID: CWE-254

Exploitation vector: Local

Exploit availability: No

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

Vendor:

Description

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

The vulnerability exists die to a logic error within the __efi_rt_asm_wrapper() function in efi-rt-wrapper.S. A local application can bypass the shadow stack protection and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://source.android.com/docs/security/bulletin/2023-05-01
http://android.googlesource.com/kernel/common/+/ec6fe823507b2f6ef4a58f3a9bee9a5ec086c32c
http://android.googlesource.com/kernel/common/+/984241bdc04f401c423005a52eb013b00e19358c

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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.