CVE-2020-2050 (GCVE-0-2020-2050)

Vulnerability from cvelistv5 – Published: 2020-11-12 00:05 – Updated: 2024-09-17 00:11
VLAI?
Summary
An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.
Severity ?
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
Palo Alto Networks PAN-OS Affected: 8.1 , < 8.1.17 (custom)
Affected: 9.0 , < 9.0.11 (custom)
Affected: 9.1 , < 9.1.5 (custom)
Affected: 10.0 , < 10.0.1 (custom)
Create a notification for this product.
Credits
This issue was found by Nicholas Newsom of Palo Alto Networks during internal security review.
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Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.\"},{\"lang\":\"es\",\"value\":\"Se presenta una vulnerabilidad de omisi\u00f3n de autenticaci\u00f3n en el componente GlobalProtect SSL VPN del software PAN-OS de Palo Alto Networks, que permite a un atacante omitir todas las comprobaciones de certificados de clientes con un certificado no v\u00e1lido.\u0026#xa0;Un atacante remoto puede autenticarse con \u00e9xito como cualquier usuario y conseguir acceso a los recursos de red VPN restringidos cuando la puerta de enlace o el portal est\u00e1n configurados para depender completamente de la autenticaci\u00f3n basada en certificados.\u0026#xa0;Las caracter\u00edsticas afectadas que usan SSL VPN con verificaci\u00f3n de certificado de cliente son: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN. En configuraciones donde la verificaci\u00f3n de certificado de cliente es usada en conjunto con otros m\u00e9todos de autenticaci\u00f3n, las protecciones agregadas por la verificaci\u00f3n de certificado son ignoradas como resultado de este problema.\u0026#xa0;Este problema afecta: versiones PAN-OS 8.1 anteriores a PAN-OS 8.1.17;\u0026#xa0;versiones PAN-OS 9.0 anteriores a PAN-OS 9.0.11;\u0026#xa0;versiones PAN-OS 9.1 anteriores a PAN-OS 9.1.5;\u0026#xa0;versiones PAN-OS 10.0 anteriores a PAN-OS 10.0.1\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:N\",\"baseScore\":6.4,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@paloaltonetworks.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-285\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.1.0\",\"versionEndExcluding\":\"8.1.17\",\"matchCriteriaId\":\"6A42777F-938A-45FB-BCD3-9F1BEDF7DB02\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.0\",\"versionEndExcluding\":\"9.0.11\",\"matchCriteriaId\":\"5CE2A954-DB66-48F8-96D7-86846D1FE5D8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.1.0\",\"versionEndExcluding\":\"9.1.5\",\"matchCriteriaId\":\"872E6056-5BE6-4FE8-BE33-F98CF0DBC67C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"10.0.0\",\"versionEndExcluding\":\"10.0.1\",\"matchCriteriaId\":\"09926771-7377-487B-B660-809265E7D8A2\"}]}]}],\"references\":[{\"url\":\"https://security.paloaltonetworks.com/CVE-2020-2050\",\"source\":\"psirt@paloaltonetworks.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://security.paloaltonetworks.com/CVE-2020-2050\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.