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    CVE-2020-13162

    A time-of-check time-of-use vulnerability in PulseSecureService.exe in Pulse Secure Client versions prior to 9.1.6 down to 5.3 R70 for Windows (which runs as NT AUTHORITY/SYSTEM) allows unprivileged users to run a Microsoft Installer executable with elevated privileges.

    Published:Jun 16, 2020
    Last Modified:May 5, 2025
    EPS:Jun 16, 2020
    EPSS Score:0.00347
    CVSS Score:7

    Affected Products

    Vendor
    Pulsesecure
    Product
    Pulse Secure Desktop Client
    Vendor
    Pulsesecure
    Product
    Pulse Secure Installer Service

    Exploits

    https://www.redtimmy.com/privilege-escalation/pulse-secure-client-for-windows-9-1-6-toctou-privilege-escalation-cve-2020-13162/https://www.redtimmy.com/privilege-escalation/pulse-secure-client-for-windows-9-1-6-toctou-privilege-escalation-cve-2020-13162/https://github.com/redtimmy/tu-TOCTOU-kaiu-TOCMEU-CVE-2020-13162-

    Related CVEs

    CVE-2020-8263 (CVSS 5.4) — A vulnerability in the authenticated user web interface of Pulse Connect Secure < 9.1R9 could allow attackers …
    CVE-2020-8241 (CVSS 7.5) — A vulnerability in the Pulse Secure Desktop Client < 9.1R9 could allow the attacker to perform a MITM Attack i…
    CVE-2020-8255 (CVSS 4.9) — A vulnerability in the Pulse Connect Secure < 9.1R9 admin web interface could allow an authenticated attacker …
    CVE-2020-8239 (CVSS 9.8) — A vulnerability in the Pulse Secure Desktop Client < 9.1R9 is vulnerable to the client registry privilege esca…
    CVE-2020-8254 (CVSS 8.8) — A vulnerability in the Pulse Secure Desktop Client < 9.1R9 has Remote Code Execution (RCE) if users can be con…
    CVE-2020-8240 (CVSS 7.8) — A vulnerability in the Pulse Secure Desktop Client < 9.1R9 allows a restricted user on an endpoint machine can…
    CVE-2020-8250 (CVSS 7.8) — A vulnerability in the Pulse Secure Desktop Client (Linux) < 9.1R9 could allow local attackers to escalate pri…
    CVE-2020-8249 (CVSS 7.8) — A vulnerability in the Pulse Secure Desktop Client (Linux) < 9.1R9 could allow local attackers to perform buff…
    CVE-2020-8248 (CVSS 7.8) — A vulnerability in the Pulse Secure Desktop Client (Linux) < 9.1R9 could allow local attackers to escalate pri…
    CVE-2020-15408 (CVSS 3.7) — An issue was discovered in Pulse Secure Pulse Connect Secure before 9.1R8. An authenticated attacker can acces…

    References

    http://packetstormsecurity.com/files/158117/Pulse-Secure-Client-For-Windows-Local-Privilege-Escalation.html
    http://packetstormsecurity.com/files/159065/Pulse-Secure-Windows-Client-Privilege-Escalation.html
    http://seclists.org/fulldisclosure/2020/Jun/25
    http://seclists.org/fulldisclosure/2020/Sep/15
    https://kb.pulsesecure.net/?atype=sa
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44503
    https://twitter.com/gsepcali/status/1262551597990711296
    https://twitter.com/gsepcali/status/1272927080909623297
    https://twitter.com/sepcali/status/1262551597990711296
    https://www.redtimmy.com/privilege-escalation/pulse-secure-client-for-windows-9-1-6-toctou-privilege-escalation-cve-2020-13162/
    http://packetstormsecurity.com/files/158117/Pulse-Secure-Client-For-Windows-Local-Privilege-Escalation.html
    http://packetstormsecurity.com/files/159065/Pulse-Secure-Windows-Client-Privilege-Escalation.html
    http://seclists.org/fulldisclosure/2020/Jun/25
    http://seclists.org/fulldisclosure/2020/Sep/15
    https://kb.pulsesecure.net/?atype=sa
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44503
    https://twitter.com/gsepcali/status/1262551597990711296
    https://twitter.com/gsepcali/status/1272927080909623297
    https://twitter.com/sepcali/status/1262551597990711296
    https://www.redtimmy.com/privilege-escalation/pulse-secure-client-for-windows-9-1-6-toctou-privilege-escalation-cve-2020-13162/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High