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.

From the Tenable Blog

CVE-2021-22893: Zero-Day Vulnerability in Pulse Connect Secure Exploited in the Wild

Published: 2021-04-20

Threat actors are leveraging a zero-day vulnerability in Pulse Connect Secure, for which there is no immediate patch scheduled for release. Update May 3, 2021: The Analysis and Solution sections have been updated to reflect the availability of a patch to address CVE-2021-22893 as well as three other vulnerabilities addressed as part of the same patch.

References

https://www.tenable.com/blog/cve-2023-46805-cve-2024-21887-zero-day-vulnerabilities-exploited-in-ivanti-connect-secure-and

https://www.tenable.com/cyber-exposure/a-look-inside-the-ransomware-ecosystem

https://www.cisa.gov/news-events/cybersecurity-advisories/aa22-117a

https://www.tenable.com/blog/behind-the-scenes-how-we-picked-2021s-top-vulnerabilities-and-what-we-left-out

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

https://web.archive.org/web/20211025233339/https://twitter.com/pancak3lullz/status/1452679527197560837

https://www.tenable.com/blog/hold-the-door-why-organizations-need-to-prioritize-patching-ssl-vpns

https://www.tenable.com/blog/cve-2021-22893-zero-day-vulnerability-in-pulse-connect-secure-exploited-in-the-wild

https://www.mandiant.com/resources/blog/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day

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

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

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

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

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

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3