Vulnerability Details : CVE-2020-8254
A vulnerability in the Pulse Secure Desktop Client < 9.1R9 has Remote Code Execution (RCE) if users can be convinced to connect to a malicious server. This vulnerability only affects Windows PDC.To improve the security of connections between Pulse clients and Pulse Connect Secure, see below recommendation(s):Disable Dynamic certificate trust for PDC.
Vulnerability category: Directory traversalExecute code
Products affected by CVE-2020-8254
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:*:*:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r3.1:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r4.1:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r4.2:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r1:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r2:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r3:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r4:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r5:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r6:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r7:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r7.1:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r8:*:*:*:windows:*:*
- cpe:2.3:a:pulsesecure:pulse_secure_desktop_client:9.1:r8.2:*:*:*:windows:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8254
0.38%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 73 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8254
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2020-8254
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: nvd@nist.gov (Primary)
-
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.Assigned by: support@hackerone.com (Secondary)
References for CVE-2020-8254
-
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44601
Pulse Security Advisory: SA44601 - 2020-10: Security Bulletin: Multiple Vulnerabilities Resolved in Pulse Connect Secure / Pulse Policy Secure / Pulse Secure Desktop Client 9.1R9Vendor Advisory
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