Multiple vulnerabilities in Pulse Connect Secure
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 6 |
| CVE-ID | CVE-2021-22937 CVE-2021-22933 CVE-2021-22934 CVE-2021-22935 CVE-2021-22936 CVE-2021-22938 |
| CWE-ID | CWE-434 CWE-22 CWE-119 CWE-78 CWE-79 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software Subscribe |
Pulse Connect Secure Server applications / Remote access servers, VPN |
| Vendor | Pulse Secure |
Security Bulletin
This security bulletin contains information about 6 vulnerabilities.
1) Arbitrary file upload
EUVDB-ID: #VU55617
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2021-22937
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote user to compromise vulnerable system.
The vulnerability exists due to insufficient validation of file during file upload within the administrative interface. A remote privileged user can upload a malicious archive and execute it on the server.
Note, the vulnerability is being actively exploited in the wild as of August 2021.
Install updates from vendor's website.
Vulnerable software versionsPulse Connect Secure: 9.1R1 - 9.1R11.5
Fixed software versionsCPE2.3 External links
http://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/p?pubstatus=o
http://us-cert.cisa.gov/ncas/current-activity/2021/08/24/cisa-releases-five-pulse-secure-related-mars
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
2) Path traversal
EUVDB-ID: #VU55618
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2021-22933
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences. A remote privileges user can send a specially crafted HTTP request and delete arbitrary files on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsPulse Connect Secure: 9.1R1 - 9.1R11.5
Fixed software versionsCPE2.3 External links
http://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/p?pubstatus=o
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
3) Buffer overflow
EUVDB-ID: #VU55619
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2021-22934
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in a load-balanced configuration. A remote privileges user can create a specially crafted HTTP request to the system, trigger memory corruption and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsPulse Connect Secure: 9.1R1 - 9.1R11.5
Fixed software versionsCPE2.3 External links
http://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/p?pubstatus=o
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
4) OS Command Injection
EUVDB-ID: #VU55620
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2021-22935
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote user to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation. A remote privileges user can send a specially crafted HTTP request to the system and execute arbitrary OS commands.
Install updates from vendor's website.
Vulnerable software versionsPulse Connect Secure: 9.1R1 - 9.1R11.5
Fixed software versionsCPE2.3 External links
http://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/p?pubstatus=o
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
5) Cross-site scripting
EUVDB-ID: #VU55621
Risk: Medium
CVSSv3.1:
CVE-ID: CVE-2021-22936
CWE-ID:
Exploit availability:
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationInstall updates from vendor's website.
Vulnerable software versionsPulse Connect Secure: 9.1R1 - 9.1R11.5
Fixed software versionsCPE2.3 External links
http://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/p?pubstatus=o
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
6) OS Command Injection
EUVDB-ID: #VU55622
Risk: Low
CVSSv3.1:
CVE-ID: CVE-2021-22938
CWE-ID:
Exploit availability:
DescriptionThe vulnerability allows a remote user to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation. A remote administrator can send a specially crafted HTTP request to the system and execute arbitrary OS commands.
MitigationInstall updates from vendor's website.
Vulnerable software versionsPulse Connect Secure: 9.1R1 - 9.1R11.5
Fixed software versionsCPE2.3 External links
http://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/p?pubstatus=o
Q & A
Can this vulnerability be exploited remotely?
How the attacker can exploit this vulnerability?
Is there known malware, which exploits this vulnerability?
