Remote code executioin in OpenSLP service in VMware ESXi



Published: 2021-02-24 | Updated: 2023-02-06
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-21974
CWE-ID CWE-122
Exploitation vector Local network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
Subscribe 		VMware ESXi
Operating systems & Components / Operating system

Vendor VMware, Inc

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU50900

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-21974

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing packets within the OpenSLP service. A remote non-authenticated attacker on the local network can send specially crafted SLP messages to port 427/tcp, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

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

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

VMware ESXi: 6.5 - ESXi_7.0.1-0.0.16850804

CPE2.3 External links

http://www.vmware.com/security/advisories/VMSA-2021-0002.html
http://kb.vmware.com/s/article/76372
http://www.zerodayinitiative.com/advisories/ZDI-21-250/


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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