Palo Alto Networks Security Advisories /CVE-2024-3382CVE-2024-3382 PAN-OS: Firewall Denial of Service (DoS) via a Burst of Crafted PacketsUrgencyMODERATEResponse EffortLOWRecoveryUSERValue DensityDIFFUSEAttack VectorNETWORKAttack ComplexityHIGHAttack RequirementsPRESENTAutomatableYESUser InteractionNONEProduct ConfidentialityNONEProduct IntegrityNONEProduct AvailabilityHIGHPrivileges RequiredNONESubsequent ConfidentialityNONESubsequent IntegrityNONESubsequent AvailabilityNONENVDJSON Published2024-04-10 Updated2024-04-10ReferencePAN-234921Discoveredin production useDescriptionA memory leak exists in Palo Alto Networks PAN-OS software that enables an attacker to send a burst of crafted packets through the firewall that eventually prevents the firewall from processing traffic. This issue applies only to PA-5400 Series devices that are running PAN-OS software with the SSL Forward Proxy feature enabled.Product StatusVersionsAffectedUnaffectedCloud NGFW NoneAllPAN-OS 11.1< 11.1.2>= 11.1.2PAN-OS 11.0< 11.0.4>= 11.0.4PAN-OS 10.2< 10.2.7-h3>= 10.2.7-h3PAN-OS 10.1NoneAllPAN-OS 9.1NoneAllPAN-OS 9.0NoneAllPrisma Access NoneAllRequired Configuration for ExposureThis issue applies only to PA-5400 Series devices that are running PAN-OS firewall configurations with the SSL Forward Proxy feature enabled. You can verify whether you have the SSL Forward Proxy feature enabled by checking for decryption policy rules in your firewall web interface (Policies > Decryption).Severity:HIGHCVSSv4.0Base Score:8.2 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:U/V:D/RE:L/U:Amber)Exploitation StatusPalo Alto Networks is not aware of any malicious exploitation of this issue.Weakness TypeCWE-770 Allocation of Resources Without Limits or ThrottlingSolutionThis issue is fixed in PAN-OS 10.2.7-h3, PAN-OS 11.0.4, PAN-OS 11.1.2, and all later PAN-OS versions.Workarounds and MitigationsYou can mitigate this issue by disabling decryption on your firewalls. To temporarily disable SSL Decryption, refer to the administrator’s guide for your PAN-OS software (such as PAN-OS 11.1: https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-admin/decryption/temporarily-disable-ssl-decryption). Additionally, to ensure that decryption remains disabled after a reboot, configure a policy-based decryption exclusion that excludes all traffic from being decrypted (https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-admin/decryption/decryption-exclusions/create-a-policy-based-decryption-exclusion).AcknowledgmentsPalo Alto Networks thanks Celedonio Albarran of Equity Residential and their Infrastructure and Security teams for discovering and reporting this issue.Timeline2024-04-10Initial publication
