| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_cake: Fix out of bounds when parsing TCP options and header\n\nThe TCP option parser in cake qdisc (cake_get_tcpopt and\ncake_tcph_may_drop) could read one byte out of bounds. When the length\nis 1, the execution flow gets into the loop, reads one byte of the\nopcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads\none more byte, which exceeds the length of 1.\n\nThis fix is inspired by commit 9609dad263f8 (\"ipv4: tcp_input: fix stack\nout of bounds when parsing TCP options.\").\n\nv2 changes:\n\nAdded doff validation in cake_get_tcphdr to avoid parsing garbage as TCP\nheader. Although it wasn't strictly an out-of-bounds access (memory was\nallocated), garbage values could be read where CAKE expected the TCP\nheader if doff was smaller than 5." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "net/sched/sch_cake.c" |
| ], |
| "versions": [ |
| { |
| "version": "8b7138814f29933898ecd31dfc83e35a30ee69f5", |
| "lessThan": "595897ef118d6fe66690c4fc5b572028c9da95b7", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8b7138814f29933898ecd31dfc83e35a30ee69f5", |
| "lessThan": "4cefa061fc63f4d2dff5ab4083f43857cd7a2335", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8b7138814f29933898ecd31dfc83e35a30ee69f5", |
| "lessThan": "3b491dd593d582ceeb27aa617600712a6bd14246", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8b7138814f29933898ecd31dfc83e35a30ee69f5", |
| "lessThan": "3371392c60e2685af30bd4547badd880f5df2b3f", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8b7138814f29933898ecd31dfc83e35a30ee69f5", |
| "lessThan": "ba91c49dedbde758ba0b72f57ac90b06ddf8e548", |
| "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/sched/sch_cake.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.19", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.19", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.196", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.128", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.46", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.12.13", |
| "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": "4.19", |
| "versionEndExcluding": "4.19.196" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.19", |
| "versionEndExcluding": "5.4.128" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.19", |
| "versionEndExcluding": "5.10.46" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.19", |
| "versionEndExcluding": "5.12.13" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.19", |
| "versionEndExcluding": "5.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/595897ef118d6fe66690c4fc5b572028c9da95b7" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/4cefa061fc63f4d2dff5ab4083f43857cd7a2335" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3b491dd593d582ceeb27aa617600712a6bd14246" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3371392c60e2685af30bd4547badd880f5df2b3f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ba91c49dedbde758ba0b72f57ac90b06ddf8e548" |
| } |
| ], |
| "title": "sch_cake: Fix out of bounds when parsing TCP options and header", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47243", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
