CVE-2025-49133

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{"affected": [{"affectedData": [{"product": "libtpms", "vendor": "stefanberger", "versions": [{"status": "affected", "version": "= 0.7.11"}, {"status": "affected", "version": "= 0.8.9"}, {"status": "affected", "version": "= 0.9.6"}, {"status": "affected", "version": "= 0.10.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:libtpms_project:libtpms:0.7.11:*:*:*:*:*:*:*", "matchCriteriaId": "6694670F-F730-4D4E-BABA-E7DD9590C427", "vulnerable": true}, {"criteria": "cpe:2.3:a:libtpms_project:libtpms:0.8.9:*:*:*:*:*:*:*", "matchCriteriaId": "C9364766-F471-4129-B95D-2B81827BD8D3", "vulnerable": true}, {"criteria": "cpe:2.3:a:libtpms_project:libtpms:0.9.6:*:*:*:*:*:*:*", "matchCriteriaId": "E0B72018-66F3-4E3C-A52C-640B8115C535", "vulnerable": true}, {"criteria": "cpe:2.3:a:libtpms_project:libtpms:0.10.0:*:*:*:*:*:*:*", "matchCriteriaId": "6BE30A5E-F67D-4625-A9C2-19DD3BF80F29", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the \u2018CryptHmacSign\u2019 function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the \u2018CryptHmacSign\u2019 function, which is defined in the \"Part 4: Supporting Routines \u2013 Code\" document, section \"7.151 - /tpm/src/crypt/CryptUtil.c \". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1."}, {"lang": "es", "value": "Libtpms es una librer\u00eda que integra la funcionalidad TPM en hipervisores, principalmente en Qemu. Libtpms, derivada del c\u00f3digo de implementaci\u00f3n de referencia de TPM 2.0 publicado por Trusted Computing Group, es propensa a una posible vulnerabilidad de lectura fuera de los l\u00edmites (OOB). La vulnerabilidad se produce en la funci\u00f3n 'CryptHmacSign' con una combinaci\u00f3n inconsistente de los par\u00e1metros signKey y signScheme, donde signKey es la clave ALG_KEYEDHASH e inScheme es un esquema ECC o RSA. La vulnerabilidad reportada se encuentra en la funci\u00f3n 'CryptHmacSign', definida en el documento \"Parte 4: Rutinas de Soporte - C\u00f3digo\", secci\u00f3n \"7.151 - /tpm/src/crypt/CryptUtil.c\". Esta vulnerabilidad puede activarse desde aplicaciones en modo usuario mediante el env\u00edo de comandos maliciosos a un TPM 2.0/vTPM (swtpm) cuyo firmware se basa en una implementaci\u00f3n de referencia de TCG afectada. El efecto en libtpms es que provocar\u00e1 una interrupci\u00f3n debido a la detecci\u00f3n de un acceso fuera de los l\u00edmites, lo que, por ejemplo, har\u00e1 que un vTPM (swtpm) no est\u00e9 disponible para una m\u00e1quina virtual. Esta vulnerabilidad est\u00e1 corregida en las versiones 0.7.12, 0.8.10, 0.9.7 y 0.10.1."}], "id": "CVE-2025-49133", "lastModified": "2026-06-17T09:30:48.100", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.5, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-49133", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-06-10T20:00:47.887183Z", "version": "2.0.3"}}]}, "published": "2025-06-10T20:15:24.337", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/stefanberger/libtpms/commit/04b2d8e9afc0a9b6bffe562a23e58c0de11532d1"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-25w5-6fjj-hf8g"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://trustedcomputinggroup.org/resource/tpm-library-specification"}, {"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://trustedcomputinggroup.org/wp-content/uploads/TPM-2.0-1.83-Part-4-Supporting-Routines-Code.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/282450"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "libtpms: Libtpms Out-of-Bounds Read Vulnerability", "id": "2371585", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2371585"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the \u2018CryptHmacSign\u2019 function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the \u2018CryptHmacSign\u2019 function, which is defined in the \"Part 4: Supporting Routines \u2013 Code\" document, section \"7.151 - /tpm/src/crypt/CryptUtil.c \". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1.", "A flaw was found in libtpms. A heap buffer overflow can occur in the `tpms_parse_pssh` function when parsing a malformed Public Signature Key Exchange (PSK) structure. A local attacker can trigger this overflow by providing a crafted PSK structure to the library. This can lead to a denial of service or allow for arbitrary code execution."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-49133", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "libtpms", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "virt:rhel/libtpms", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Fix deferred", "package_name": "virt:8.2/libtpms", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Fix deferred", "package_name": "virt:av/libtpms", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libtpms", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-10T19:46:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-49133\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-49133\nhttps://github.com/stefanberger/libtpms/commit/04b2d8e9afc0a9b6bffe562a23e58c0de11532d1\nhttps://github.com/stefanberger/libtpms/security/advisories/GHSA-25w5-6fjj-hf8g\nhttps://trustedcomputinggroup.org/resource/tpm-library-specification\nhttps://trustedcomputinggroup.org/wp-content/uploads/TPM-2.0-1.83-Part-4-Supporting-Routines-Code.pdf"], "statement": "This vulnerability, identified as a potential out-of-bounds read, is triggered by inconsistent parameters within the CryptHmacSign function of the vTPM (virtual Trusted Platform Module). Although the attack is local to the system, it requires user interaction in the form of sending malicious commands to the vTPM. The primary impact is a denial-of-service (DoS) to the virtual machine (VM) by rendering its vTPM unavailable. This prevents the VM from utilizing critical TPM functionality, which can lead to significant operational disruption. While this flaw does not enable arbitrary code execution, the potential for DoS and broader system instability justifies a Moderate severity rating. The requirement for specific user interaction reduces its severity from what would otherwise be an Important classification.", "threat_severity": "Moderate"}

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