Ivanti Pulse Connect Secure Arbitrary File Read Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
• Known to be used in ransomware campaigns
• EPSS: 100% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 10.0

[ Description ]Official description

In Pulse Secure Pulse Connect Secure (PCS) 8.2 before 8.2R12.1, 8.3 before 8.3R7.1, and 9.0 before 9.0R3.4, an unauthenticated remote attacker can send a specially crafted URI to perform an arbitrary file reading vulnerability .

CISA: Ivanti Pulse Connect Secure contains an arbitrary file read vulnerability that allows an unauthenticated remote attacker with network access via HTTPS to send a specially crafted URI.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 May 2022): Apply updates per vendor instructions.

• Patch on kb.pulsesecure.netVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• packetstormsecurity.com/files/154176/Pulse-Secure-SSL-VPN-8.1R15.1-8.2-8.3-9.0-Arbitrar…ExploitThird Party AdvisoryVDB Entry
• packetstormsecurity.com/files/154231/Pulse-Secure-SSL-VPN-File-Disclosure-NSE.htmlThird Party AdvisoryVDB Entry
• www.securityfocus.com/bid/108073Broken LinkThird Party AdvisoryVDB Entry
• badpackets.net/over-14500-pulse-secure-vpn-endpoints-vulnerable-to-cve-2019-11510Broken LinkThird Party Advisory
• devco.re/blog/2019/09/02/attacking-ssl-vpn-part-3-the-golden-Pulse-Secure-ssl-vpn-rce-c…ExploitThird Party Advisory
• i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdfThird Party Advisory
• kb.pulsesecure.netNot ApplicableVendor Advisory
• kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101Broken LinkPatchVendor Advisory
• lists.apache.org/thread.html/ff5fa1837b6bd1b24d18a42faa75e165a4573dbe2d434910c15fd08a%4…Mailing List
• psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0010Third Party Advisory
• www.kb.cert.org/vuls/id/927237Third Party AdvisoryUS Government Resource
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource