CVE-2023-6507

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The issue was fixed in CPython 3.12.1 and does not affect other stable releases.</span></p><p><span style=\"background-color: transparent;\">When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list.</span></p><p><span style=\"background-color: transparent;\">This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).</span></p>"}], "value": "An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. 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The issue was fixed in CPython 3.12.1 and does not affect other stable releases.\n\nWhen using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list.\n\nThis issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`)."}, {"lang": "es", "value": "Se encontr\u00f3 un problema en el m\u00f3dulo `subproceso` de CPython 3.12.0 en plataformas POSIX. El problema se solucion\u00f3 en CPython 3.12.1 y no afecta a otras versiones estables. Cuando se utiliza el par\u00e1metro `extra_groups=` con una lista vac\u00eda como valor (es decir, `extra_groups=[]`), la l\u00f3gica retrocede para no llamar a `setgroups(0, NULL)` antes de llamar a `exec()`, por lo que no se descarta el grupos de procesos originales antes de iniciar el nuevo proceso. No hay ning\u00fan problema cuando no se usa el par\u00e1metro o cuando se usa cualquier valor adem\u00e1s de una lista vac\u00eda. Este problema solo afecta los procesos de CPython que se ejecutan con privilegios suficientes para realizar la llamada al sistema \"setgroups\" (normalmente \"root\")."}], "id": "CVE-2023-6507", "lastModified": "2026-07-31T15:16:26.330", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 5.2, "source": "cna@python.org", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-6507", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-01-31T20:16:20.207522Z", "version": "2.0.3"}}]}, "published": "2023-12-08T19:15:08.440", "references": [{"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/10e9bb13b8dcaa414645b9bd10718d8f7179e82b"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/85bbfa8a4bbdbb61a3a84fbd7cb29a4096ab8a06"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/9fe7655c6ce0b8e9adc229daf681b6d30e6b1610"}, {"source": "cna@python.org", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/python/cpython/issues/112334"}, {"source": "cna@python.org", "tags": ["Third Party Advisory"], "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/AUL7QFHBLILGISS7U63B47AYSSGJJQZD/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/python/cpython/commit/10e9bb13b8dcaa414645b9bd10718d8f7179e82b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/python/cpython/commit/85bbfa8a4bbdbb61a3a84fbd7cb29a4096ab8a06"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/python/cpython/commit/9fe7655c6ce0b8e9adc229daf681b6d30e6b1610"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/python/cpython/issues/112334"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/AUL7QFHBLILGISS7U63B47AYSSGJJQZD/"}], "sourceIdentifier": "cna@python.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "cna@python.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "python: Improper privileges drop on subprocess module", "id": "2293948", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293948"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-269", "details": ["An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases.\nWhen using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list.\nThis issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).", "A flaw was found in Python's subprocess module. When creating a new subprocess, the developer may specify a list of extra groups through the 'extra_groups=` parameter. When this optional parameter is informed with an empty list, the module fails to properly clean the associated groups from the new sub-process's parent before executing the new sub-process. If the parent process has high privileges, the sub-process created may have unnecessarily high privileges, leading to possible confidentiality and integrity issues when properly exploited."], "name": "CVE-2023-6507", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "python3.12", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "python", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "python", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "python3", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python27:2.7/python2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python3", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python3.11", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python3.12", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python36:3.6/python36", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python39:3.9/python39", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python39-devel:3.9/python39", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "python3.11", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "python3.12", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "python3.9", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2023-12-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-6507\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-6507"], "statement": "The Python versions as distributed with Red Hat Enterprise Linux 6, 7, 8 and 9 are not vulnerable to this flaw, as it doesn't contain the affected code or it ships a version where the fix is already present.", "threat_severity": "Moderate"}

{}