| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "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": "6670e152447732ba90626f36dfc015a13fbf150e", |
| "lessThan": "992de06308d9a9584d59b96d294ac676f924e437", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "6670e152447732ba90626f36dfc015a13fbf150e", |
| "lessThan": "9884f745108f7d25b189bbcd6754e284fb29ab68", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "6670e152447732ba90626f36dfc015a13fbf150e", |
| "lessThan": "6c1ea8bee75df8fe2184a50fcd0f70bf82986f42", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "6670e152447732ba90626f36dfc015a13fbf150e", |
| "lessThan": "efe1532a6e1a8e3c343d04fff510f0ed80328f9c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "6670e152447732ba90626f36dfc015a13fbf150e", |
| "lessThan": "e7d7bedd507bb732e600403b7a96f9fe48d0ca31", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "6670e152447732ba90626f36dfc015a13fbf150e", |
| "lessThan": "8d432592f30fcc34ef5a10aac4887b4897884493", |
| "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": "semver" |
| }, |
| { |
| "version": "4.19.191", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.119", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.37", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.11.21", |
| "lessThanOrEqual": "5.11.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.4", |
| "lessThanOrEqual": "5.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.13", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.15", |
| "versionEndExcluding": "4.19.191" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.15", |
| "versionEndExcluding": "5.4.119" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.15", |
| "versionEndExcluding": "5.10.37" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.15", |
| "versionEndExcluding": "5.11.21" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.15", |
| "versionEndExcluding": "5.12.4" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.15", |
| "versionEndExcluding": "5.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "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-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47010", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
