Multiple vulnerabilities in VMware vCenter Server



Published: 2021-02-24
Risk High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2021-21973
CVE-2021-21972
CWE ID CWE-918
CWE-20
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
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vCenter Server
Server applications / Virtualization software

Cloud Foundation
Client/Desktop applications / Virtualization software

Vendor VMware, Inc

Security Advisory

1) Server-Side Request Forgery (SSRF)

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-21973

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in vSphere Client. A remote non-authenticated attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

vCenter Server: 6.5, 6.5 U1, 6.5 U3, 6.5.0, 6.5.0a, 6.5.0b, 6.5.0c, 6.5.0d, 6.5u2c, 6.7, 6.7 U3, 6.7.0, 6.7.0d, 6.7u3f, 7.0

Cloud Foundation: before 3.10.1.2, 4.2

CPE External links

https://www.vmware.com/security/advisories/VMSA-2021-0002.html
https://kb.vmware.com/s/article/82374

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.

2) Input validation error

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-21972

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: Yes

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in vSphere Client. A remote non-authenticated attacker can send a specially crafted HTTP request to port 443/tcp and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

vCenter Server: 6.5, 6.5 U1, 6.5 U3, 6.5.0, 6.5.0a, 6.5.0b, 6.5.0c, 6.5.0d, 6.5u2c, 6.7, 6.7 U3, 6.7.0, 6.7.0d, 6.7u3f, 7.0

Cloud Foundation: before 3.10.1.2, 4.2

CPE External links

https://www.vmware.com/security/advisories/VMSA-2021-0002.html
https://kb.vmware.com/s/article/82374
http://noahblog.360.cn/vcenter-6-5-7-0-rce-lou-dong-fen-xi/

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. However, proof of concept for this vulnerability is available.



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