Home/CVE/A time-of-check time-of-use vulnerability in PulseSecureService.exe in Pulse Secure Client versions prior to 9.1.6 down
CVE

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

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.

HIGH · CVSS 7 EPSS 0.00347
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
▤

Affected Products & Versions

2
pulsesecure pulse secure desktop clientall versions
pulsesecure pulse secure installer serviceall versions
⚠

Public Exploits & PoCs

3
pocpacketstormsecurity.com · Pulse-Secure-Client-For-Windows-Local-Privilege-Escalatio...packetstormsecurity.com
pocpacketstormsecurity.com · Pulse-Secure-Windows-Client-Privilege-Escalation.htmlpacketstormsecurity.com
pocwww.redtimmy.com · pulse-secure-client-for-windows-9-1-6-toctou-privilege-es...www.redtimmy.com
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Jun 2020 · 08:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2020/Jun/25Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2020/Sep/15Mailing ListThird Party Advisory
https://kb.pulsesecure.net/?atype=saVendor Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44503Vendor Advisory
https://twitter.com/gsepcali/status/1262551597990711296Third Party Advisory
https://twitter.com/gsepcali/status/1272927080909623297Third Party Advisory
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