Remote code execution in U-Boot

1) Buffer overflow

EUVDB-ID: #VU64420

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-30767

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the nfs_lookup_reply() function in net/nfs.c. A remote attacker can pass specially crafted data to the application, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability exists due to incomplete fix for CVE-2019-14196.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

U-Boot: 2022.04 - 2022.07 rc2

CPE2.3

• cpe:2.3:a:denx:u-boot:2022.07:rc2:*:*:*:*:*:*
• cpe:2.3:a:denx:u-boot:2022.07:rc1:*:*:*:*:*:*
• cpe:2.3:a:denx:u-boot:2022.04:rc5:*:*:*:*:*:*

External links

http://lists.denx.de/pipermail/u-boot/2022-May/483952.html
http://github.com/u-boot/u-boot/commit/5d14ee4e53a81055d34ba280cb8fd90330f22a96
http://securitylab.github.com/research/uboot-rce-nfs-vulnerability/

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.