{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47160", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.109Z", "datePublished": "2024-03-25T09:16:14.468Z", "dateUpdated": "2024-12-19T07:36:19.197Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T07:36:19.197Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mt7530: fix VLAN traffic leaks\n\nPCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but\nwas not reset when it is disabled, which may cause traffic leaks:\n\n\tip link add br0 type bridge vlan_filtering 1\n\tip link add br1 type bridge vlan_filtering 1\n\tip link set swp0 master br0\n\tip link set swp1 master br1\n\tip link set br0 type bridge vlan_filtering 0\n\tip link set br1 type bridge vlan_filtering 0\n\t# traffic in br0 and br1 will start leaking to each other\n\nAs port_bridge_{add,del} have set up PCR_MATRIX properly, remove the\nPCR_MATRIX write from mt7530_port_set_vlan_aware."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/dsa/mt7530.c"], "versions": [{"version": "83163f7dca5684816d01c8ccf4857aa74801e7b7", "lessThan": "ae389812733b1b1e8e07fcc238e41db166b5c78d", "status": "affected", "versionType": "git"}, {"version": "83163f7dca5684816d01c8ccf4857aa74801e7b7", "lessThan": "4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488", "status": "affected", "versionType": "git"}, {"version": "83163f7dca5684816d01c8ccf4857aa74801e7b7", "lessThan": "b91117b66fe875723a4e79ec6263526fffdb44d2", "status": "affected", "versionType": "git"}, {"version": "83163f7dca5684816d01c8ccf4857aa74801e7b7", "lessThan": "82ae35b6c14feae5f216913d5b433e143c756d4e", "status": "affected", "versionType": "git"}, {"version": "83163f7dca5684816d01c8ccf4857aa74801e7b7", "lessThan": "474a2ddaa192777522a7499784f1d60691cd831a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/dsa/mt7530.c"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.193", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.124", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.42", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.9", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d"}, {"url": "https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488"}, {"url": "https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2"}, {"url": "https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e"}, {"url": "https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a"}], "title": "net: dsa: mt7530: fix VLAN traffic leaks", "x_generator": {"engine": "bippy-5f407fcff5a0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47160", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-25T13:55:35.659497Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:13:48.308Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.982Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a", "tags": ["x_transferred"]}]}]}}

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Como port_bridge_{add,del} ha configurado PCR_MATRIX correctamente, elimine la escritura PCR_MATRIX de mt7530_port_set_vlan_aware."}], "id": "CVE-2021-47160", "lastModified": "2025-03-13T21:24:02.300", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-03-25T10:15:08.377", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: dsa: mt7530: fix VLAN traffic leaks", "id": "2271472", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271472"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: dsa: mt7530: fix VLAN traffic leaks\nPCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but\nwas not reset when it is disabled, which may cause traffic leaks:\nip link add br0 type bridge vlan_filtering 1\nip link add br1 type bridge vlan_filtering 1\nip link set swp0 master br0\nip link set swp1 master br1\nip link set br0 type bridge vlan_filtering 0\nip link set br1 type bridge vlan_filtering 0\n# traffic in br0 and br1 will start leaking to each other\nAs port_bridge_{add,del} have set up PCR_MATRIX properly, remove the\nPCR_MATRIX write from mt7530_port_set_vlan_aware."], "name": "CVE-2021-47160", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47160\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47160\nhttps://lore.kernel.org/linux-cve-announce/2024032534-CVE-2021-47160-8e53@gregkh/T"], "threat_severity": "Low"}