gsd-2023-4207
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.
When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.
We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.
Aliases
Aliases
{ "GSD": { "alias": "CVE-2023-4207", "id": "GSD-2023-4207" }, "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2023-4207" ], "details": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nWhen fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.\n\n", "id": "GSD-2023-4207", "modified": "2023-12-13T01:20:27.129752Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "security@google.com", "ID": "CVE-2023-4207", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Kernel", "version": { "version_data": [ { "version_affected": "\u003c", "version_name": "3.18", "version_value": "6.5" } ] } } ] }, "vendor_name": "Linux" } ] } }, "credits": [ { "lang": "en", "value": "valis" }, { "lang": "en", "value": "Bing-Jhong Billy Jheng" } ], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nWhen fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.\n\n" } ] }, "generator": { "engine": "Vulnogram 0.1.0-dev" }, "impact": { "cvss": [ { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "cweId": "CWE-416", "lang": "eng", "value": "CWE-416 Use After Free" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ec", "refsource": "MISC", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ec" }, { "name": "https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec", "refsource": "MISC", "url": "https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec" }, { "name": "https://www.debian.org/security/2023/dsa-5492", "refsource": "MISC", "url": "https://www.debian.org/security/2023/dsa-5492" }, { "name": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html", "refsource": "MISC", "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html" } ] }, "source": { "discovery": "EXTERNAL" } }, "nvd.nist.gov": { "cve": { "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8E857727-2DE9-4334-8C95-B7FB874F17C9", "versionEndExcluding": "4.14.326", "versionStartIncluding": "3.18", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D419C7D6-F33D-4EF8-8950-1CB5DDF6A55D", "versionEndExcluding": "4.19.295", "versionStartIncluding": "4.15", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0707E9FF-8CDE-4AC1-98F3-5BB74EF88F8A", "versionEndExcluding": "5.4.253", "versionStartIncluding": "4.20", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8DECE4F-2D62-4976-B338-963015198AC8", "versionEndExcluding": "5.10.190", "versionStartIncluding": "5.5", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C552AC9E-23B8-4D7D-AA26-57985BD93962", "versionEndExcluding": "5.15.126", "versionStartIncluding": "5.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A0CA013D-55AF-4494-A931-AFC8EA64E875", "versionEndExcluding": "6.1.45", "versionStartIncluding": "5.16", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7BB0D94C-4FCE-46F4-A8D4-062D6A84627A", "versionEndExcluding": "6.4.10", "versionStartIncluding": "6.2", "vulnerable": true } ], "negate": false, "operator": "OR" } ] }, { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*", "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "descriptions": [ { "lang": "en", "value": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nWhen fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.\n\n" }, { "lang": "es", "value": "Se puede explotar una vulnerabilidad de use-after-free en el componente Linux kernel\u0027s net/sched: cls_fw para conseguir una escalada local de privilegios. Cuando se llama a fw_change() en un filtro existente, toda la estructura tcf_result se copia siempre en la nueva instancia del filtro.Esto causa un problema cuando se actualiza un filtro vinculado a una clase, ya que tcf_unbind_filter() siempre llama a la instancia antigua en la ruta de \u00e9xito, disminuyendo filter_cnt de la clase a\u00fan referenciada y permitiendo que se elimine, lo que lleva a un Use After Free. Recomendamos actualizar el commit a partir de 76e42ae831991c828cffa8c37736ebfb831ad5ec." } ], "id": "CVE-2023-4207", "lastModified": "2024-02-05T19:55:24.707", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary" }, { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "cve-coordination@google.com", "type": "Secondary" } ] }, "published": "2023-09-06T14:15:11.453", "references": [ { "source": "cve-coordination@google.com", "tags": [ "Issue Tracking", "Mailing List", "Patch", "Vendor Advisory" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ec" }, { "source": "cve-coordination@google.com", "tags": [ "Patch", "Vendor Advisory" ], "url": "https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec" }, { "source": "cve-coordination@google.com", "tags": [ "Mailing List", "Third Party Advisory", "VDB Entry" ], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html" }, { "source": "cve-coordination@google.com", "tags": [ "Third Party Advisory" ], "url": "https://www.debian.org/security/2023/dsa-5492" } ], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Analyzed", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "nvd@nist.gov", "type": "Primary" }, { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "cve-coordination@google.com", "type": "Secondary" } ] } } } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.