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Palo Alto Networks PAN-OS 10.2.x < 10.2.14 / 11.1.x < 11.1.8 / 11.2.x < 11.2.8 Vulnerability

medium Nessus Plugin ID 344630

Synopsis

The remote PAN-OS host is affected by a vulnerability

Description

The version of Palo Alto Networks PAN-OS running on the remote host is 10.2.x prior to 10.2.14, 11.1.x prior to 11.1.8, or 11.2.x prior to 11.2.8. It is, therefore, affected by a vulnerability.

 The Terrapin attack allows an attacker with the ability to intercept SSH traffic on affected Palo Alto Networks products (through machine-in-the-middle or MitM attacks) to downgrade connection security and force the usage of less secure client authentication algorithms when an administrator or user connects to the product.

 This issue does not impact the SSH server component of PAN-OS software configured to exclusively use strong cipher algorithms or configured to operate in FIPS-CC mode, which removes support for the impacted algorithms.

 When using the PAN-OS SSH client to connect to an SSH server that supports the CHACHA20-POLY1305 algorithm or any Encrypt-then-MAC algorithms, the traffic is susceptible to this attack.

 This issue affects Prisma SD-WAN ION devices.

 Additional information and technical details about the attack can be found at https://terrapin-attack.com.

Tenable has extracted the preceding description block directly from the PAN-OS security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to PAN-OS 10.2.14 / 11.1.8 / 11.2.8 or later

See Also

https://security.paloaltonetworks.com/CVE-2023-48795

Plugin Details

Severity: Medium

ID: 344630

File Name: palo_alto_CVE-2023-48795.nasl

Version: 1.1

Type: Combined

Published: 9/10/2026

Updated: 9/10/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.39

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.2

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2023-48795

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6

Threat Score: 5.3

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:paloaltonetworks:pan-os

Required KB Items: Host/Palo_Alto/Firewall/Version, Host/Palo_Alto/Firewall/Full_Version, Host/Palo_Alto/Firewall/Source, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/9/2024

Vulnerability Publication Date: 6/13/2023

Reference Information

CVE: CVE-2023-48795

CWE: 354