SB2019120501 - Multiple vulnerabilities in Palo Alto Networks PAN-OS

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2019-1559)

The vulnerability allows a remote attacker to decrypt sensitive information.

The vulnerability exists due to the way an application behaves, when it receives a 0-byte record with invalid padding compared to the record with an invalid MAC, which results in padding oracle. A remote attacker can decrypt data.

Successful exploitation of the vulnerability requires that the application is using "non-stitched" ciphersuites and calls SSL_shutdown() twice (first, via a BAD_RECORD_MAC and again via a CLOSE_NOTIFY). 

2) Improper Authentication (CVE-ID: CVE-2019-17437)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an error in authentication process. A local non-privileged user can gain elevated privileges on the device.

Remediation

Install update from vendor's website.

References

• https://securityadvisories.paloaltonetworks.com/Home/Detail/202
• https://securityadvisories.paloaltonetworks.com/Home/Detail/201