CVE-2021-22893

Description

Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Browser and Pulse Secure Collaboration features of Pulse Connect Secure that can allow an unauthenticated user to perform remote arbitrary code execution on the Pulse Connect Secure gateway. This vulnerability has been exploited in the wild.

Related CPE's

apulsesecurepulse_connect_secure9.0-******
vulnerable
apulsesecurepulse_connect_secure9.0r1******
vulnerable
apulsesecurepulse_connect_secure9.0r2******
vulnerable
apulsesecurepulse_connect_secure9.0r2.1******
vulnerable
apulsesecurepulse_connect_secure9.0r3******
vulnerable
apulsesecurepulse_connect_secure9.0r3.1******
vulnerable
apulsesecurepulse_connect_secure9.0r3.2******
vulnerable
apulsesecurepulse_connect_secure9.0r3.3******
vulnerable
apulsesecurepulse_connect_secure9.0r3.5******
vulnerable
apulsesecurepulse_connect_secure9.0r4******
vulnerable

References

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/

Vendor Advisory

https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html

Third Party Advisory

https://kb.cert.org/vuls/id/213092

Third Party AdvisoryUS Government Resource

https://blog.pulsesecure.net/pulse-connect-secure-security-update/

Vendor Advisory

CvssV3 impact

BaseSeverity

CRITICAL

ConfidentialityImpact

HIGH

AttackComplexity

LOW

Scope

CHANGED

AttackVector

NETWORK

AvailabilityImpact

HIGH

IntegrityImpact

HIGH

PrivilegesRequired

NONE

BaseScore

10

VectorString

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Version

3.1

UserInteraction

NONE

CvssV2 impact

AccessComplexity

LOW

ConfidentialityImpact

PARTIAL

AvailabilityImpact

PARTIAL

IntegrityImpact

PARTIAL

BaseScore

7.5

VectorString

AV:N/AC:L/Au:N/C:P/I:P/A:P

Version

2.0

AccessVector

NETWORK

Authentication

NONE