Palo Alto Networks Security Advisories / CVE-2020-2043

CVE-2020-2043 PAN-OS: Passwords may be logged in clear text when using after-change-detail custom syslog field for config logs

047910
Severity 3.3 · LOW
Attack Vector LOCAL
Attack Complexity LOW
Privileges Required LOW
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact LOW
Integrity Impact NONE
Availability Impact NONE

Description

An information exposure through log file vulnerability where sensitive fields are recorded in the configuration log without masking on Palo Alto Networks PAN-OS software when the after-change-detail custom syslog field is enabled for configuration logs and the sensitive field appears multiple times in one log entry. The first instance of the sensitive field is masked but subsequent instances are left in clear text.

This issue impacts:

PAN-OS 8.1 versions earlier than PAN-OS 8.1.16;

PAN-OS 9.0 versions earlier than PAN-OS 9.0.10;

PAN-OS 9.1 versions earlier than PAN-OS 9.1.4.

Product Status

VersionsAffectedUnaffected
PAN-OS 10.0None>= 10.0.0
PAN-OS 9.1< 9.1.4>= 9.1.4
PAN-OS 9.0< 9.0.10>= 9.0.10
PAN-OS 8.1< 8.1.16>= 8.1.16

Required Configuration for Exposure

This issue is only applicable when when the after-change-detail custom syslog field is enabled for config logs.

Severity: LOW

CVSSv3.1 Base Score: 3.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)

Weakness Type

CWE-532 Information Exposure Through Log Files

Solution

This issue is fixed in PAN-OS 8.1.16, PAN-OS 9.0.10, PAN-OS 9.1.4, and all later PAN-OS versions.

Workarounds and Mitigations

This issue requires access to PAN-OS log files generated in the system. You can mitigate the impact of this issue by following best practices for securing the PAN-OS management interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation, available at https://docs.paloaltonetworks.com/best-practices.

Acknowledgments

This issue was found by a customer of Palo Alto Networks during internal security review.

Timeline

Initial publication
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