CVE-2023-5574

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This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service."}, {"lang": "es", "value": "Se encontr\u00f3 una falla de use-after-free en xorg-x11-server-Xvfb. Este problema ocurre en Xvfb con una configuraci\u00f3n heredada muy espec\u00edfica (una configuraci\u00f3n de pantalla m\u00faltiple con m\u00faltiples pantallas de protocolo, tambi\u00e9n conocida como modo Zaphod). Si el puntero se deforma de una pantalla 1 a una pantalla 0, se puede desencadenar un problema de use-after-free durante el apagado o reinicio del servidor Xvfb, lo que permite una posible escalada de privilegios o denegaci\u00f3n de servicio."}], "id": "CVE-2023-5574", "lastModified": "2026-11-04T21:17:25.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-5574", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-06-03T15:51:10.403013Z", "version": "2.0.3"}}]}, "published": "2023-10-25T20:15:18.717", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:2298"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2023-5574"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2244735"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://lists.x.org/archives/xorg-announce/2023-October/003430.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:2298"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2023-5574"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2244735"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://lists.x.org/archives/xorg-announce/2023-October/003430.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20231130-0004/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:2298", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "tigervnc-0:1.13.1-8.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}], "bugzilla": {"description": "xorg-x11-server: Use-after-free bug in DamageDestroy", "id": "2244735", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2244735"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.", "A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service."], "mitigation": {"lang": "en:us", "value": "Starting Xvfb with the -noreset command line option limits the use-after-free from being triggered only at the Xvfb server shutdown. Also, do not start Xvfb as root."}, "name": "CVE-2023-5574", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "impact": "moderate", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "impact": "moderate", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "moderate", "package_name": "xorg-x11-server-Xwayland", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "impact": "moderate", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "impact": "moderate", "package_name": "xorg-x11-server-Xwayland", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2023-10-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-5574\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-5574\nhttps://lists.x.org/archives/xorg-announce/2023-October/003430.html"], "statement": "Xvfb does not run with root privileges in Red Hat Enterprise Linux 7, 8, and 9, therefore, Red Hat Enterprise Linux 7, 8, and 9 have been rated with a moderate severity.\nThe xorg-x11-server-Xwayland package as shipped by Red Hat Enterprise Linux 8 and 9 is not affected by this issue as Xwayland does not support multiple protocol screens and is not affected by this vulnerability.", "threat_severity": "Important"}

{}