{ "document": { "acknowledgments": [ { "organization": "CERT@VDE", "summary": "coordination", "urls": [ "https://certvde.com" ] } ], "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en-GB", "notes": [ { "category": "summary", "text": "\n\n\nThe OpenSSL library used in the affected products is vulnerable to an unbounded growth of the session cache in the TLSv1.3 implementation. \n\n\n", "title": "Summary" }, { "category": "description", "text": "A remote attacker can exhaust all memory by establishing a large number of TLSv1.3 connections to the web interface, causing the device to reboot.", "title": "Impact" }, { "text": "Phoenix Contact recommends that customers restrict network access to the device's web interface to as few networks as possible.", "title": "Mitigation", "category": "description" }, { "text": "Phoenix Contact recommends upgrading the firmware of affected devices to version 1.8.0, which fixes the vulnerability.", "title": " Remediation", "category": "description" } ], "publisher": { "contact_details": "psirt@phoenixcontact.com", "name": "Phoenix Contact GmbH & Co. KG", "namespace": "https://phoenixcontact.com/psirt", "category": "vendor" }, "references": [ { "category": "self", "summary": "VDE-2024-029: Phoenix Contact: Unbounded growth of OpenSSL session cache in multiple FL MGUARD devices - HTML", "url": "https://certvde.com/en/advisories/VDE-2024-029/" }, { "category": "self", "summary": "VDE-2024-029: Phoenix Contact: Unbounded growth of OpenSSL session cache in multiple FL MGUARD devices - CSAF", "url": "https://phoenixcontact.csaf-tp.certvde.com/.well-known/csaf/white/2024/vde-2024-029.json" }, { "category": "external", "summary": "Vendor PSIRT", "url": "https://phoenixcontact.com/psirt" }, { "category": "external", "summary": "CERT@VDE Security Advisories for Phoenix Contact GmbH & Co. KG", "url": "https://certvde.com/en/advisories/vendor/phoenixcontact/" } ], "title": "Phoenix Contact: Unbounded growth of OpenSSL session cache in multiple FL MGUARD devices", "tracking": { "aliases": [ "VDE-2024-029" ], "current_release_date": "2024-06-11T06:00:00.000Z", "generator": { "date": "2025-04-10T08:00:21.712Z", "engine": { "name": "Secvisogram", "version": "2.5.23" } }, "id": "VDE-2024-029", "initial_release_date": "2024-06-11T06:00:00.000Z", "revision_history": [ { "date": "2024-06-11T06:00:00.000Z", "number": "1", "summary": "Initial revision." } ], "status": "final", "version": "1" } }, "product_tree": { "branches": [ { "name": "Phoenix Contact", "category": "vendor", "branches": [ { "name": "Hardware", "category": "product_family", "branches": [ { "name": "FL MGUARD 1102", "category": "product_name", "product": { "name": "FL MGUARD 1102", "product_id": "CSAFPID-11001", "product_identification_helper": { "model_numbers": [ "1153079" ] } } }, { "name": "FL MGUARD 1105", "category": "product_name", "product": { "name": "FL MGUARD 1105", "product_id": "CSAFPID-11002", "product_identification_helper": { "model_numbers": [ "1153078" ] } } } ] }, { "name": "Firmware", "category": "product_family", "branches": [ { "name": "<1.8.0", "category": "product_version_range", "product": { "name": "Firmware <1.8.0", "product_id": "CSAFPID-21001" } }, { "name": "1.8.0", "category": "product_version", "product": { "name": "Firmware 1.8.0", "product_id": "CSAFPID-22001" } } ] } ] } ], "product_groups": [ { "group_id": "CSAFGID-0001", "product_ids": [ "CSAFPID-31001", "CSAFPID-31002" ], "summary": "Affected products." }, { "group_id": "CSAFGID-0002", "product_ids": [ "CSAFPID-32001", "CSAFPID-32002" ], "summary": "Fixed products." } ], "relationships": [ { "product_reference": "CSAFPID-21001", "relates_to_product_reference": "CSAFPID-11001", "category": "installed_on", "full_product_name": { "name": "Firmware <1.8.0 installed on FL MGUARD 1102", "product_id": "CSAFPID-31001" } }, { "product_reference": "CSAFPID-21001", "relates_to_product_reference": "CSAFPID-11002", "category": "installed_on", "full_product_name": { "name": "Firmware <1.8.0 installed on FL MGUARD 1105", "product_id": "CSAFPID-31002" } }, { "product_reference": "CSAFPID-22001", "relates_to_product_reference": "CSAFPID-11001", "category": "installed_on", "full_product_name": { "name": "Firmware 1.8.0 installed on FL MGUARD 1102", "product_id": "CSAFPID-32001" } }, { "product_reference": "CSAFPID-22001", "relates_to_product_reference": "CSAFPID-11002", "category": "installed_on", "full_product_name": { "name": "Firmware 1.8.0 installed on FL MGUARD 1105", "product_id": "CSAFPID-32002" } } ] }, "vulnerabilities": [ { "cve": "CVE-2024-2511", "title": "CVE-2024-2511", "cwe": { "id": "CWE-1325", "name": "Improperly Controlled Sequential Memory Allocation" }, "notes": [ { "category": "description", "text": "Issue summary: Some non-default TLS server configurations can cause unbounded\nmemory growth when processing TLSv1.3 sessions\n\nImpact summary: An attacker may exploit certain server configurations to trigger\nunbounded memory growth that would lead to a Denial of Service\n\nThis problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is\nbeing used (but not if early_data support is also configured and the default\nanti-replay protection is in use). In this case, under certain conditions, the\nsession cache can get into an incorrect state and it will fail to flush properly\nas it fills. The session cache will continue to grow in an unbounded manner. A\nmalicious client could deliberately create the scenario for this failure to\nforce a Denial of Service. It may also happen by accident in normal operation.\n\nThis issue only affects TLS servers supporting TLSv1.3. It does not affect TLS\nclients.\n\nThe FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL\n1.0.2 is also not affected by this issue.", "title": "Vulnerability Description" } ], "product_status": { "known_affected": [ "CSAFPID-31001", "CSAFPID-31002" ], "fixed": [ "CSAFPID-32001", "CSAFPID-32002" ] }, "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM", "environmentalScore": 5.9, "environmentalSeverity": "MEDIUM", "temporalScore": 5.9, "temporalSeverity": "MEDIUM" }, "products": [ "CSAFPID-31001", "CSAFPID-31002" ] } ], "remediations": [ { "category": "mitigation", "details": "Phoenix Contact recommends that customers restrict network access to the device's web interface to as few networks as possible.", "group_ids": [ "CSAFGID-0001" ] }, { "category": "vendor_fix", "details": "Phoenix Contact recommends upgrading the firmware of affected devices to version 1.8.0, which fixes the vulnerability.", "group_ids": [ "CSAFGID-0001" ] } ] } ] }