#VU64419 Out-of-bounds write in U-Boot - CVE-2019-14196

Vulnerability identifier: #VU64419

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-14196

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
U-Boot
Client/Desktop applications / Other client software

Vendor: DENX

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the nfs_lookup_reply() function in net/nfs.c. A remote attacker can create a specially crafted data to the application, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

U-Boot: 2019.0 - 2019.07

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External links
https://blog.semmle.com/uboot-rce-nfs-vulnerability/
https://gitlab.com/u-boot/u-boot

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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.