Integer underflow in Google, Google Android

1) Integer underflow

EUVDB-ID: #VU37082

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-5850

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

In the function csr_update_fils_params_rso(), insufficient validation on a key length can result in an integer underflow leading to a buffer overflow in all Android releases from CAF (Android for MSM, Firefox OS for MSM, QRD Android) using the Linux Kernel.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Google Android: All versions

CPE2.3

External links

http://source.android.com/security/bulletin/2018-05-01
http://www.codeaurora.org/security-bulletin/2018/05/11/may-2018-code-aurora-security-bulletin-2

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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