Security restrictions bypass in Palo Alto Network PAN-OS



Published: 2020-11-12
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-1999
CWE ID CWE-754
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Improper Check for Unusual or Exceptional Conditions

Risk: Medium

CVSSv3: 4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-1999

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect processing of exceptional conditions in the PAN-OS signature-based threat detection engine. A remote non-authenticated attacker can communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 7.1, 7.1.0, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.4-h2, 7.1.5, 7.1.6, 7.1.7, 7.1.8, 7.1.9, 7.1.9-h4, 7.1.10, 7.1.11, 7.1.12, 7.1.13, 7.1.14, 7.1.15, 7.1.16, 7.1.17, 7.1.18, 7.1.19, 7.1.20, 7.1.21, 7.1.22, 7.1.23, 7.1.24, 7.1.24-h1, 7.1.25, 7.1.26, 8.0, 8.0.0, 8.0.1, 8.0.2, 8.0.3, 8.0.3-h4, 8.0.4, 8.0.4-h2, 8.0.5, 8.0.6, 8.0.6-h3, 8.0.7, 8.0.8, 8.0.9, 8.0.10, 8.0.11, 8.0.11-h1, 8.0.12, 8.0.13, 8.0.14, 8.0.15, 8.0.16, 8.0.17, 8.0.18, 8.0.19, 8.0.19-h1, 8.0.20, 8.0.21, 8.1, 8.1.0, 8.1.1, 8.1.2, 8.1.3, 8.1.4, 8.1.4-h2, 8.1.5, 8.1.6, 8.1.6-h2, 8.1.7, 8.1.8, 8.1.8-h4, 8.1.8-h5, 8.1.9, 8.1.9-h4, 8.1.10, 8.1.11, 8.1.12, 8.1.13, 8.1.14, 8.1.15, 8.1.16, 9.0, 9.0.0, 9.0.1, 9.0.2, 9.0.2-h4, 9.0.3, 9.0.3-h2, 9.0.3-h3, 9.0.4, 9.0.5, 9.0.5-h3, 9.0.6, 9.0.7, 9.0.8, 9.0.9, 9.0.10, 9.1, 9.1.0, 9.1.1, 9.1.2, 9.1.3, 9.1.4

CPE External links

https://security.paloaltonetworks.com/CVE-2020-1999

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?

No. We are not aware of malware exploiting this vulnerability.



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