#VU29606 Integer underflow

Published: 2020-07-09 | Updated: 2020-07-15

Vulnerability identifier: #VU29606

Vulnerability risk: Low

CVSSv3.1: 4.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-2031


Exploitation vector: Network

Exploit availability: No

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

Vendor: Palo Alto Networks, Inc.


The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to integer underflow in the dnsproxyd component of the PAN-OS management interface. A remote authenticated administrator attacker can send a specially crafted request to the affected application, trigger integer underflow and perform a denial of service attack by restarting the device and putting it into maintenance mode.

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 9.1.0, 9.1.1, 9.1.2


External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

Latest bulletins with this vulnerability