#VU27038 Stack-based buffer overflow in Ivanti Connect Secure (formerly Pulse Connect Secure) and Ivanti Policy Secure (formerly Pulse Policy Secure) - CVE-2019-11542

Vulnerability identifier: #VU27038

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-11542

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ivanti Connect Secure (formerly Pulse Connect Secure)
Server applications / Remote access servers, VPN
Ivanti Policy Secure (formerly Pulse Policy Secure)
Server applications / Remote access servers, VPN

Vendor: Ivanti

Description

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

The vulnerability exists due to a boundary error in Pulse Connect Secure and Pulse Policy Secure. A remote authenticated authenticated user (via the admin web interface)  can send specially crafted message, trigger a stack-based buffer overflow and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ivanti Connect Secure (formerly Pulse Connect Secure): 8.1R1.0 - 9.0R3.2

Ivanti Policy Secure (formerly Pulse Policy Secure): 5.1R1.0 - 9.0R3.1

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External links
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101/
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0010

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.