Vulnerability identifier: #VU9662

Vulnerability risk: High

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2017-15944

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor: Palo Alto Networks, Inc.

Description
The vulnerability allows a remote attacker to execute arbitrary command on the target system.

The weakness exists due to multiple vulnerabilities in PAN-OS on Management Interface. A remote attacker can trigger deserialization error in processing the PHPSESSID cookie, modify the session file, cause an XML injection cookie injection error, bypass the panAuthCheck authentication directive controlling access to the '/php' directory, conduct an XML injection attack against the '/php/utils/router.php' script, create arbitrary directories, conduct a command injection attack against the '/usr/local/bin/genindex_batch.sh' cron script and execute arbitrary system commands with root privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 6.1.19, 7.0.19, 7.1.14, 8.0.6.

Vulnerable software versions

Palo Alto PAN-OS: 6.1.0 - 6.1.18, 7.0.0 - 7.0.18, 7.1.0 - 7.1.13, 8.0.0 - 8.0.5

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External links
http://securityadvisories.paloaltonetworks.com/Home/Detail/102

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.