SB2022020929 - Multiple vulnerabilities in GlobalProtect Agent

Description

This security bulletin contains information about 4 vulnerabilities.

1) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2022-0021)

CWE-ID: CWE-532 - Information Exposure Through Log Files

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to software stores cleartext credentials of the connecting GlobalProtect user when authenticating using Connect Before Logon feature. A local user can read the log files and gain access to sensitive data.

2) Information disclosure (CVE-ID: CVE-2022-0018)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to credentials of the local user account are sent to the GlobalProtect portal when the Single Sign-On feature is enabled in the GlobalProtect portal configuration. A remote attacker can perform MitM attack and intercept credentials.

This vulnerability is a concern where the GlobalProtect app is deployed on Bring-your-Own-Device (BYOD) type of clients with private local user accounts or GlobalProtect app is used to connect to different organizations.

3) Link following (CVE-ID: CVE-2022-0017)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insecure link following issue. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with SYSTEM privileges.

4) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2022-0016)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper handling of exceptional conditions within the Connect Before Logon feature. A local user can under certain circumstances execute arbitrary code with SYSTEM privileges when authenticating with Connect Before Logon.

Remediation

Install update from vendor's website.

References

• https://security.paloaltonetworks.com/CVE-2022-0021
• https://security.paloaltonetworks.com/CVE-2022-0018
• https://security.paloaltonetworks.com/CVE-2022-0017
• https://security.paloaltonetworks.com/CVE-2022-0016