CVE-2024-2494

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The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en las API de la librer\u00eda RPC de libvirt. El c\u00f3digo de deserializaci\u00f3n del servidor RPC asigna memoria para las matrices antes de que los puntos de entrada de la API de C realicen la verificaci\u00f3n de longitud no negativa. Pasar una longitud negativa a la funci\u00f3n g_new0 provoca un bloqueo debido a que la longitud negativa se trata como un n\u00famero positivo enorme. Esta falla permite que un usuario local sin privilegios realice un ataque de denegaci\u00f3n de servicio provocando la falla del demonio libvirt."}], "id": "CVE-2024-2494", "lastModified": "2026-11-05T13:17:00.593", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-2494", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-01T15:14:30.397427Z", "version": "2.0.3"}}]}, "published": "2024-03-21T14:15:10.350", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:2560"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:3253"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2024-2494"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2270115"}, {"source": "secalert@redhat.com", "url": "https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:2560"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:3253"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/security/cve/CVE-2024-2494"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2270115"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240517-0009/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Alexander Kuznetsov (ALT Linux Team) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2024:3253", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "virt-devel:rhel-8100020240409073027.489197e6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-05-22T00:00:00Z"}, {"advisory": "RHSA-2024:3253", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "virt:rhel-8100020240409073027.489197e6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-05-22T00:00:00Z"}, {"advisory": "RHSA-2024:2560", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "libvirt-0:10.0.0-6.2.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}], "bugzilla": {"description": "libvirt: negative g_new0 length can lead to unbounded memory allocation", "id": "2270115", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2270115"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-789", "details": ["A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash.", "A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory for arrays before the non-negative length check is performed by the C API entry points. Passing a negative length to the g_new0 function results in a crash due to the negative length being treated as a huge positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by causing the libvirt daemon to crash."], "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-2024-2494", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "libvirt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Will not fix", "package_name": "virt:av/libvirt", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}], "public_date": "2024-03-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-2494\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-2494\nhttps://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/BKRQXPLPC6B7FLHJXSBQYW7HNDEBW6RJ/"], "threat_severity": "Moderate"}

{}