{ "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": "OpenSSL has published a stack based buffer overflow vulnerability that allows a remote attacker to cause a denial of service (DoS) or potentially allow for remote code execution.\n\nSiemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further 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-734552: Buffer Overflow Vulnerability in OpenSSL Affecting Desigo CC - HTML Version", "url": "https://cert-portal.siemens.com/productcert/html/ssa-734552.html" }, { "category": "self", "summary": "SSA-734552: Buffer Overflow Vulnerability in OpenSSL Affecting Desigo CC - CSAF Version", "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-734552.json" } ], "title": "SSA-734552: Buffer Overflow Vulnerability in OpenSSL Affecting Desigo CC", "tracking": { "current_release_date": "2026-07-14T00:00:00.000Z", "generator": { "engine": { "name": "Siemens ProductCERT CSAF Generator", "version": "1" } }, "id": "SSA-734552", "initial_release_date": "2026-07-14T00:00:00.000Z", "revision_history": [ { "date": "2026-07-14T00:00:00.000Z", "legacy_version": "1.0", "number": "1", "summary": "Publication Date" } ], "status": "interim", "version": "1" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:all/*", "product": { "name": "Desigo CC family V7", "product_id": "1" } } ], "category": "product_name", "name": "Desigo CC family V7" }, { "branches": [ { "category": "product_version_range", "name": "vers:all/*", "product": { "name": "Desigo CC family V8", "product_id": "2" } } ], "category": "product_name", "name": "Desigo CC family V8" }, { "branches": [ { "category": "product_version_range", "name": "vers:intdot/<9.0.1", "product": { "name": "Desigo CC family V9 < V9.0.1", "product_id": "3" } } ], "category": "product_name", "name": "Desigo CC family V9" } ], "category": "vendor", "name": "Siemens" } ] }, "vulnerabilities": [ { "cve": "CVE-2025-15467", "cwe": { "id": "CWE-787", "name": "Out-of-bounds Write" }, "notes": [ { "category": "description", "text": "Issue summary: Parsing CMS AuthEnvelopedData message with maliciously\r\ncrafted AEAD parameters can trigger a stack buffer overflow.\r\nImpact summary: A stack buffer overflow may lead to a crash, causing Denial\r\nof Service, or potentially remote code execution.\r\n\r\nWhen parsing CMS AuthEnvelopedData structures that use AEAD ciphers such as\r\nAES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is\r\ncopied into a fixed-size stack buffer without verifying that its length fits\r\nthe destination. An attacker can supply a crafted CMS message with an\r\noversized IV, causing a stack-based out-of-bounds write before any\r\nauthentication or tag verification occurs.\r\n\r\nApplications and services that parse untrusted CMS or PKCS#7 content using\r\nAEAD ciphers (e.g., S/MIME AuthEnvelopedData with AES-GCM) are vulnerable.\r\nBecause the overflow occurs prior to authentication, no valid key material\r\nis required to trigger it. While exploitability to remote code execution\r\ndepends on platform and toolchain mitigations, the stack-based write\r\nprimitive represents a severe risk.\r\n\r\nThe FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this\r\nissue, as the CMS implementation is outside the OpenSSL FIPS module\r\nboundary.\r\n\r\nOpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue.\r\n\r\nOpenSSL 1.1.1 and 1.0.2 are not affected by this issue.", "title": "CVE Description" } ], "product_status": { "known_affected": [ "1", "2", "3" ] }, "remediations": [ { "category": "none_available", "details": "Currently no fix is available", "product_ids": [ "1" ] }, { "category": "vendor_fix", "details": "Update to V9.0 QU1 or later version", "product_ids": [ "3" ], "url": "https://support.industry.siemens.com/cs/ww/en/view/110002555/" }, { "category": "vendor_fix", "details": "Update to patch V8.0 QU2.0021", "product_ids": [ "2" ] }, { "category": "vendor_fix", "details": "https://support.industry.siemens.com/cs/ww/en/view/109989041/", "product_ids": [ "2" ] } ], "scores": [ { "cvss_v3": { "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "1", "2", "3" ] } ], "title": "CVE-2025-15467" } ] }