In Pulse Secure Pulse Connect Secure (PCS) before 8.1R15.1, 8.2 before 8.2R12.1, 8.3 before 8.3R7.1, and 9.0 before 9.0R3.4, an authenticated attacker can upload a malicious file to write to arbitrary files, because of Insecure Permissions.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-11510
• https://i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdf
• https://kb.pulsesecure.net/?atype=sa
• https://lists.apache.org/thread.html/ff5fa1837b6bd1b24d18a42faa75e165a4573dbe2d434910c15fd08a@%3Cuser.guacamole.apache.org%3E
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0010
• https://www.kb.cert.org/vuls/id/927237
• http://packetstormsecurity.com/files/154176/Pulse-Secure-SSL-VPN-8.1R15.1-8.2-8.3-9.0-Arbitrary-File-Disclosure.html
• http://packetstormsecurity.com/files/154231/Pulse-Secure-SSL-VPN-File-Disclosure-NSE.html
• http://www.securityfocus.com/bid/108073
• https://lists.apache.org/thread.html/ff5fa1837b6bd1b24d18a42faa75e165a4573dbe2d434910c15fd08a%40%3Cuser.guacamole.apache.org%3E
• https://badpackets.net/over-14500-pulse-secure-vpn-endpoints-vulnerable-to-cve-2019-11510
• https://devco.re/blog/2019/09/02/attacking-ssl-vpn-part-3-the-golden-Pulse-Secure-ssl-vpn-rce-chain-with-Twitter-as-case-study
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101