{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2021-47010", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.953Z", "datePublished": "2024-02-28T08:13:29.051Z", "dateUpdated": "2024-08-07T15:25:44.662Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:00:28.790Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Only allow init netns to set default tcp cong to a restricted algo\n\ntcp_set_default_congestion_control() is netns-safe in that it writes\nto &net->ipv4.tcp_congestion_control, but it also sets\nca->flags |= TCP_CONG_NON_RESTRICTED which is not namespaced.\nThis has the unintended side-effect of changing the global\nnet.ipv4.tcp_allowed_congestion_control sysctl, despite the fact that it\nis read-only: 97684f0970f6 (\"net: Make tcp_allowed_congestion_control\nreadonly in non-init netns\")\n\nResolve this netns \"leak\" by only allowing the init netns to set the\ndefault algorithm to one that is restricted. This restriction could be\nremoved if tcp_allowed_congestion_control were namespace-ified in the\nfuture.\n\nThis bug was uncovered with\nhttps://github.com/JonathonReinhart/linux-netns-sysctl-verify" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv4/tcp_cong.c" ], "versions": [ { "version": "6670e1524477", "lessThan": "992de06308d9", "status": "affected", "versionType": "git" }, { "version": "6670e1524477", "lessThan": "9884f745108f", "status": "affected", "versionType": "git" }, { "version": "6670e1524477", "lessThan": "6c1ea8bee75d", "status": "affected", "versionType": "git" }, { "version": "6670e1524477", "lessThan": "efe1532a6e1a", "status": "affected", "versionType": "git" }, { "version": "6670e1524477", "lessThan": "e7d7bedd507b", "status": "affected", "versionType": "git" }, { "version": "6670e1524477", "lessThan": "8d432592f30f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv4/tcp_cong.c" ], "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.191", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.119", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.37", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.11.21", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.12.4", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/992de06308d9a9584d59b96d294ac676f924e437" }, { "url": "https://git.kernel.org/stable/c/9884f745108f7d25b189bbcd6754e284fb29ab68" }, { "url": "https://git.kernel.org/stable/c/6c1ea8bee75df8fe2184a50fcd0f70bf82986f42" }, { "url": "https://git.kernel.org/stable/c/efe1532a6e1a8e3c343d04fff510f0ed80328f9c" }, { "url": "https://git.kernel.org/stable/c/e7d7bedd507bb732e600403b7a96f9fe48d0ca31" }, { "url": "https://git.kernel.org/stable/c/8d432592f30fcc34ef5a10aac4887b4897884493" } ], "title": "net: Only allow init netns to set default tcp cong to a restricted algo", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.534Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/992de06308d9a9584d59b96d294ac676f924e437", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/9884f745108f7d25b189bbcd6754e284fb29ab68", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/6c1ea8bee75df8fe2184a50fcd0f70bf82986f42", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/efe1532a6e1a8e3c343d04fff510f0ed80328f9c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e7d7bedd507bb732e600403b7a96f9fe48d0ca31", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8d432592f30fcc34ef5a10aac4887b4897884493", "tags": [ "x_transferred" ] } ] }, { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-400", "lang": "en", "description": "CWE-400 Uncontrolled Resource Consumption" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6670e1524477", "status": "affected", "lessThan": "992de06308d9", "versionType": "custom" }, { "version": "6670e1524477", "status": "affected", "lessThan": "9884f745108f", "versionType": "custom" }, { "version": "6670e1524477", "status": "affected", "lessThan": "6c1ea8bee75d", "versionType": "custom" }, { "version": "6670e1524477", "status": "affected", "lessThan": "efe1532a6e1a", "versionType": "custom" }, { "version": "6670e1524477", "status": "affected", "lessThan": "e7d7bedd507b", "versionType": "custom" }, { "version": "6670e1524477", "status": "affected", "lessThan": "8d432592f30f", "versionType": "custom" }, { "version": "4.15", "status": "affected" }, { "version": "0", "status": "unaffected", "lessThan": "4.15", "versionType": "custom" }, { "version": "4.19.191", "status": "unaffected", "lessThanOrEqual": "4.20", "versionType": "custom" }, { "version": "5.4.119", "status": "unaffected", "lessThanOrEqual": "5.5", "versionType": "custom" }, { "version": "5.10.37", "status": "unaffected", "lessThanOrEqual": "5.11", "versionType": "custom" }, { "version": "5.11.21", "status": "unaffected", "lessThanOrEqual": "5.12", "versionType": "custom" }, { "version": "5.12.4", "status": "unaffected", "lessThanOrEqual": "5.13", "versionType": "custom" }, { "version": "5.13", "status": "unaffected", "lessThanOrEqual": "*", "versionType": "custom" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-07-25T15:24:31.511356Z", "id": "CVE-2021-47010", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-08-07T15:25:44.662Z" } } ] } }