Vulnerability · Published Jun 10, 2020 · Assigned by palo_alto

CVE-2020-2033GlobalProtect App: Missing certificate validation vulnerability can disclose pre-logon authentication cookie

Medium 5.3

In plain English

A medium-severity authentication bypass by spoofing in GlobalProtect App from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.9%top 41.0% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

When the pre-logon feature is enabled, a missing certification validation in Palo Alto Networks GlobalProtect app can disclose the pre-logon authentication cookie to a man-in-the-middle attacker on the same local area network segment with the ability to manipulate ARP or to conduct ARP spoofing attacks. This allows the attacker to access the GlobalProtect Server as allowed by configured Security rules for the 'pre-login' user. This access may be limited compared to the network access of regular users. This issue affects: GlobalProtect app 5.0 versions earlier than GlobalProtect app 5.0.10 when the prelogon feature is enabled; GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.4 when the prelogon feature is enabled.

Affected products (as reported)

Vendor	Product	Versions
Palo Alto Networks	GlobalProtect App	5.1 – before 5.1.45.0 – before 5.0.10

Weakness: CWE-290, CWE-295 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://security.paloaltonetworks.com/CVE-2020-2033 x_refsource_MISC