Integer underflow in Palo Alto PAN-OS



Published: 2020-07-09
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-2031
CWE-ID CWE-191
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Integer underflow

EUVDB-ID: #VU29606

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

CWE-ID: CWE-191 - Integer Underflow (Wrap or Wraparound)

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 9.1.0, 9.1.1, 9.1.2

CPE2.3 External links

http://security.paloaltonetworks.com/CVE-2020-2031

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.



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