#VU75043 Out-of-bounds write in VxWorks - CVE-2020-28895

Vulnerability identifier: #VU75043

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-2020-28895

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
VxWorks
Operating systems & Components / Operating system

Vendor: Wind River Systems, Inc.

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

VxWorks: 6.9 - 7

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External links
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2020-28895
https://support2.windriver.com/index.php?page=defects&on=view&id=V7LIBC-1327
https://www.oracle.com/security-alerts/cpuapr2022.html

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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.