Remote code execution in Pulse Connect Secure



Published: 2021-04-20 | Updated: 2021-05-04
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-22893
CWE ID CWE-287
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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Pulse Connect Secure
Server applications / Remote access servers, VPN

Vendor Pulse Secure

Security Advisory

Updated: 20.04.2021

Added information about in the wild exploitation of the vulnerability.

Updated: 04.05.2021

Added information about patch availability. changed bulletin status to patched.

1) Improper Authentication

Risk: Critical

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-22893

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process and compromise the affected device.

The vulnerability exists due to multiple issues in web interface. A remote non-authenticated attacker can bypass authentication process and gain unauthorized access to the application via license server web services.

Successful exploitation of the vulnerability may allow an attacker to execute arbitrary code on the system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Pulse Connect Secure: 9.0R3, 9.0R3.1, 9.0R3.2, 9.0R3.4, 9.0R3.5, 9.0R4, 9.0R4.1, 9.0R5.0, 9.0R6.0, 9.1R1, 9.1R2, 9.1R3, 9.1R4, 9.1R4.1, 9.1R4.2, 9.1R4.3, 9.1R5, 9.1R6, 9.1R7, 9.1R8, 9.1R8.1, 9.1R8.2, 9.1R8.4, 9.1R9, 9.1R9.1, 9.1R9.2, 9.1R10, 9.1R10.0, 9.1R10.2, 9.1R11, 9.1R11.0, 9.1R11.1, 9.1R11.3

CPE External links

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/p?pubstatus=o

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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