{ "document": { "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)", "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "summary", "text": "The SIPROTEC 5 devices do not use sufficiently random numbers to generate session identifiers. This could facilitate a brute-force attack against a valid session identifier which could allow an unauthenticated remote attacker to hijack a valid user session. The affected session identifiers are only used in a subset of the endpoints that are provided by the affected products.\n\nSiemens is preparing fix versions and recommends countermeasures for products where fixes are not, or not yet available.", "title": "Summary" }, { "category": "general", "text": "Operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid's reliability can thus be minimized by virtue of the grid design.\nSiemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. \nAs a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment.\n\nRecommended security guidelines can be found at:\nhttps://www.siemens.com/gridsecurity", "title": "General Recommendations" }, { "category": "general", "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories", "title": "Additional Resources" }, { "category": "legal_disclaimer", "text": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "productcert@siemens.com", "name": "Siemens ProductCERT", "namespace": "https://www.siemens.com" }, "references": [ { "category": "self", "summary": "SSA-786884: Insufficient Randomness in Session Identifier Vulnerability in SIPROTEC 5 - HTML Version", "url": "https://cert-portal.siemens.com/productcert/html/ssa-786884.html" }, { "category": "self", "summary": "SSA-786884: Insufficient Randomness in Session Identifier Vulnerability in SIPROTEC 5 - CSAF Version", "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-786884.json" } ], "title": "SSA-786884: Insufficient Randomness in Session Identifier Vulnerability in SIPROTEC 5", "tracking": { "current_release_date": "2026-05-12T00:00:00.000Z", "generator": { "engine": { "name": "Siemens ProductCERT CSAF Generator", "version": "1" } }, "id": "SSA-786884", "initial_release_date": "2026-05-12T00:00:00.000Z", "revision_history": [ { "date": "2026-05-12T00:00:00.000Z", "legacy_version": "1.0", "number": "1", "summary": "Publication Date" } ], "status": "interim", "version": "1" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:intdot/<11.0", "product": { "name": "SIPROTEC 5 6MD84 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], "category": "product_name", "name": "SIPROTEC 5 7UT85 (CP300)" }, { "branches": [ { "category": "product_version_range", "name": "vers:all/*", "product": { "name": "SIPROTEC 5 7UT86 (CP200)", "product_id": "55" } } ], "category": "product_name", "name": "SIPROTEC 5 7UT86 (CP200)" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/>=7.80|<11.0", "product": { "name": "SIPROTEC 5 7UT86 (CP300)", "product_id": "56" } } ], "category": "product_name", "name": "SIPROTEC 5 7UT86 (CP300)" }, { "branches": [ { "category": "product_version_range", "name": "vers:all/*", "product": { "name": "SIPROTEC 5 7UT87 (CP200)", "product_id": "57" } } ], "category": "product_name", "name": "SIPROTEC 5 7UT87 (CP200)" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/>=7.80|<11.0", "product": { "name": "SIPROTEC 5 7UT87 (CP300)", "product_id": "58" } } ], "category": "product_name", "name": "SIPROTEC 5 7UT87 (CP300)" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/>=7.80|<11.0", "product": { "name": "SIPROTEC 5 7VE85 (CP300)", "product_id": "59" } } ], "category": "product_name", "name": "SIPROTEC 5 7VE85 (CP300)" }, { "branches": [ { "category": "product_version_range", "name": "vers:all/*", "product": { "name": "SIPROTEC 5 7VK87 (CP200)", "product_id": "60" } } ], "category": "product_name", "name": "SIPROTEC 5 7VK87 (CP200)" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/>=7.80|<11.0", "product": { "name": "SIPROTEC 5 7VK87 (CP300)", "product_id": "61" } } ], "category": "product_name", "name": "SIPROTEC 5 7VK87 (CP300)" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/<11.0", "product": { "name": "SIPROTEC 5 7VU85 (CP300)", "product_id": "62" } } ], "category": "product_name", "name": "SIPROTEC 5 7VU85 (CP300)" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/<11.0", "product": { "name": "SIPROTEC 5 Compact 7SX800 (CP050)", "product_id": "63" } } ], "category": "product_name", "name": "SIPROTEC 5 Compact 7SX800 (CP050)" } ], "category": "vendor", "name": "Siemens" } ] }, "vulnerabilities": [ { "cve": "CVE-2024-54017", "cwe": { "id": "CWE-334", "name": "Small Space of Random Values" }, "flags": [ { "label": "component_not_present", "product_ids": [ "8", "15", "34", "4", "2", "55", "20", "30", "28", "60", "13", "19", "57", "44", "22", "38", "53", "40", "42", "12" ] } ], "notes": [ { "category": "summary", "text": "Affected devices do not use sufficiently random values to create session identifiers. This could allow an unauthenticated remote attacker to brute force a session identifier and gain read access to limited information from the web server without authorization.", "title": "Summary" } ], "product_status": { "known_affected": [ "1", "3", "5", "6", "7", "9", "10", "11", "14", "16", "17", "18", "21", "23", "24", "25", "26", "27", "29", "31", "32", "33", "35", "36", "37", "39", "41", "43", "45", "46", "47", "48", "49", "50", "51", "52", "54", "56", "58", "59", "61", "62", "63" ], "known_not_affected": [ "2", "4", "8", "12", "13", "15", "19", "20", "22", "28", "30", "34", "38", "40", "42", "44", "53", "55", "57", "60" ] }, "remediations": [ { "category": "none_available", "details": "Currently no fix is available", "product_ids": [ "10", "17", "24", "26", "32", "36", "51" ] }, { "category": "vendor_fix", "details": "Update to V11.0 or later version", "product_ids": [ "1", "3", "5", "6", "7", "9", "14", "16", "21", "23", "29", "31", "35", "39", "41", "43", "45", "46", "48", "50", "54", "56", "58", "59", "61", "62" ], "url": "https://support.industry.siemens.com/cs/ww/en/view/109814150/" }, { "category": "vendor_fix", "details": "Update to V11.0 or later version", "product_ids": [ "11", "18", "25", "27", "33", "37", "47", "49", "52" ], "url": "https://support.industry.siemens.com/cs/ww/en/view/109757433/" }, { "category": "vendor_fix", "details": "Update to V11.0 or later version", "product_ids": [ "63" ], "url": "https://support.industry.siemens.com/cs/ww/en/view/109796884/" } ], "scores": [ { "cvss_v3": { "baseScore": 5.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1" }, "products": [ "1", "3", "5", "6", "7", "9", "10", "11", "14", "16", "17", "18", "21", "23", "24", "25", "26", "27", "29", "31", "32", "33", "35", "36", "37", "39", "41", "43", "45", "46", "47", "48", "49", "50", "51", "52", "54", "56", "58", "59", "61", "62", "63" ] } ], "threats": [ { "category": "impact", "details": "Web access is not supported", "product_ids": [ "8", "15", "34", "4", "2", "55", "20", "30", "28", "60", "13", "19", "57", "44", "22", "38", "53", "40", "42", "12" ] } ], "title": "CVE-2024-54017" } ] }