CVE-2023-6395

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This weakness stems from the absence of proper sandboxing during the expansion and execution of Jinja2 templates, which may be included in certain configuration parameters. While the Mock documentation advises treating users added to the mock group as privileged, certain build systems invoking mock on behalf of users might inadvertently permit less privileged users to define configuration tags. These tags could then be passed as parameters to mock during execution, potentially leading to the utilization of Jinja2 templates for remote privilege escalation and the execution of arbitrary code as the root user on the build server."}, {"lang": "es", "value": "El software Mock contiene una vulnerabilidad en la que un atacante podr\u00eda explotar la escalada de privilegios, permitiendo la ejecuci\u00f3n de c\u00f3digo arbitrario con privilegios de usuario root. Esta debilidad se debe a la ausencia de una sandbox adecuada durante la expansi\u00f3n y ejecuci\u00f3n de las plantillas de Jinja2, que pueden incluirse en ciertos par\u00e1metros de configuraci\u00f3n. Si bien la documentaci\u00f3n de Mock recomienda tratar a los usuarios agregados al grupo simulado como privilegiados, ciertos sistemas de compilaci\u00f3n que invocan simulacros en nombre de los usuarios podr\u00edan permitir sin darse cuenta que usuarios con menos privilegios definan etiquetas de configuraci\u00f3n. Luego, estas etiquetas podr\u00edan pasarse como par\u00e1metros para simular durante la ejecuci\u00f3n, lo que podr\u00eda llevar a la utilizaci\u00f3n de plantillas Jinja2 para la escalada remota de privilegios y la ejecuci\u00f3n de c\u00f3digo arbitrario como usuario ra\u00edz en el servidor de compilaci\u00f3n."}], "id": "CVE-2023-6395", "lastModified": "2026-06-17T06:50:40.763", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-6395", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-10-25T20:10:59.775490Z", "version": "2.0.3"}}]}, "published": "2024-01-16T15:15:08.657", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2024/01/16/1"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2024/01/16/3"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2023-6395"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2252206"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "https://github.com/xsuchy/templated-dictionary/commit/0740bd0ca8d487301881541028977d120f8b8933"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "https://github.com/xsuchy/templated-dictionary/commit/bcd90f0dafa365575c4b101e6f5d98c4ef4e4b69"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/62SP2BJC2AFLFJJAEHPGZ3ZINTBTI7AN/"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NBFYREAJH4T7GXXQZ4GJEREN4Q3AHS3K/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2024/01/16/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2024/01/16/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2023-6395"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2252206"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/xsuchy/templated-dictionary/commit/0740bd0ca8d487301881541028977d120f8b8933"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/xsuchy/templated-dictionary/commit/bcd90f0dafa365575c4b101e6f5d98c4ef4e4b69"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/62SP2BJC2AFLFJJAEHPGZ3ZINTBTI7AN/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NBFYREAJH4T7GXXQZ4GJEREN4Q3AHS3K/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-94"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Sankin Nikita Alexeevich for reporting this issue.", "bugzilla": {"description": "Mock: Privilege escalation for users that can access mock configuration", "id": "2252206", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2252206"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["The Mock software contains a vulnerability wherein an attacker could potentially exploit privilege escalation, enabling the execution of arbitrary code with root user privileges. This weakness stems from the absence of proper sandboxing during the expansion and execution of Jinja2 templates, which may be included in certain configuration parameters. While the Mock documentation advises treating users added to the mock group as privileged, certain build systems invoking mock on behalf of users might inadvertently permit less privileged users to define configuration tags. These tags could then be passed as parameters to mock during execution, potentially leading to the utilization of Jinja2 templates for remote privilege escalation and the execution of arbitrary code as the root user on the build server.", "The Mock software contains a vulnerability wherein an attacker could potentially exploit privilege escalation, enabling the execution of arbitrary code with root user privileges. This weakness stems from the absence of proper sandboxing during the expansion and execution of Jinja2 templates, which may be included in certain configuration parameters. While the Mock documentation advises treating users added to the mock group as privileged, certain build systems invoking mock on behalf of users might inadvertently permit less privileged users to define configuration tags. These tags could then be passed as parameters to mock during execution, potentially leading to the utilization of Jinja2 templates for remote privilege escalation and the execution of arbitrary code as the root user on the build server."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2023-6395", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "mock", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2024-01-16T13:52:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-6395\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-6395\nhttps://github.com/xsuchy/templated-dictionary/commit/0740bd0ca8d487301881541028977d120f8b8933\nhttps://github.com/xsuchy/templated-dictionary/commit/bcd90f0dafa365575c4b101e6f5d98c4ef4e4b69"], "statement": "The identified vulnerability in the Mock software represents a moderate threat from a technical standpoint. The risk lies in the potential for an attacker to exploit privilege escalation, gaining the ability to execute arbitrary code with root user privileges. This vulnerability arises due to the absence of proper sandboxing during the expansion and execution of Jinja2 templates in specific configuration parameters. While the Mock documentation advises treating certain users as privileged, the risk is amplified by certain build systems inadvertently allowing less privileged users to define configuration tags. These tags can be passed as parameters to Mock during execution, creating a pathway for remote privilege escalation and the execution of arbitrary code on the build server. The moderate classification is attributed to the specific conditions required for exploitation and the potential impact on system integrity.\nThe fix for this issue is located at the `TemplatedDictionary' library, which mock heavily relies on to expand configuration values. This library was part of `mock` before but it was stripped to a separated code base in mock 2.9-1, while the vulnerability itself was introduced while `TemplatedDictionary` was part of mock code base in mock 1.4.\nRed Hat Enterprise Linux 7, 8 and 9 are not affected by this vulnerability as those versions doesn't ship the `mock` package.", "threat_severity": "Moderate"}

{}