210 lines
10 KiB
JSON
210 lines
10 KiB
JSON
{
|
||
"dataType": "CVE_RECORD",
|
||
"dataVersion": "5.2",
|
||
"cveMetadata": {
|
||
"cveId": "CVE-2021-47132",
|
||
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
||
"state": "PUBLISHED",
|
||
"assignerShortName": "Linux",
|
||
"dateReserved": "2024-03-04T18:12:48.840Z",
|
||
"datePublished": "2024-03-15T20:14:35.337Z",
|
||
"dateUpdated": "2026-08-05T08:46:14.316Z"
|
||
},
|
||
"containers": {
|
||
"cna": {
|
||
"providerMetadata": {
|
||
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
||
"shortName": "Linux",
|
||
"dateUpdated": "2026-08-05T08:46:14.316Z"
|
||
},
|
||
"descriptions": [
|
||
{
|
||
"lang": "en",
|
||
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix sk_forward_memory corruption on retransmission\n\nMPTCP sk_forward_memory handling is a bit special, as such field\nis protected by the msk socket spin_lock, instead of the plain\nsocket lock.\n\nCurrently we have a code path updating such field without handling\nthe relevant lock:\n\n__mptcp_retrans() -> __mptcp_clean_una_wakeup()\n\nSeveral helpers in __mptcp_clean_una_wakeup() will update\nsk_forward_alloc, possibly causing such field corruption, as reported\nby Matthieu.\n\nAddress the issue providing and using a new variant of blamed function\nwhich explicitly acquires the msk spin lock."
|
||
}
|
||
],
|
||
"metrics": [
|
||
{
|
||
"cvssV3_1": {
|
||
"version": "3.1",
|
||
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
|
||
"baseScore": 7.5,
|
||
"baseSeverity": "HIGH"
|
||
},
|
||
"scenarios": [
|
||
{
|
||
"lang": "en",
|
||
"value": "AV:N - The bug is in the MPTCP protocol path (net/mptcp/); a remote MPTCP peer can induce retransmission (withheld/delayed ACKs or loss) and concurrently send packets that update sk_forward_alloc in softirq, reaching the unlocked clean_una path.\nAC:L - The attacker controls both sides of the race—triggering MPTCP-level retransmission while sending traffic that races on sk_forward_alloc under mptcp_data_lock—so success does not depend on conditions outside attacker influence.\nPR:N - No local privileges are required; an unauthenticated remote peer of an MPTCP connection (e.g., client to an internet-facing MPTCP service) can drive the retransmission and concurrent RX accounting paths.\nUI:N - Exploitation needs no victim user action beyond an existing or attacker-initiated MPTCP session; packet timing alone triggers the race.\nS:U - Impact is confined to the vulnerable host kernel’s socket memory accounting; there is no cross-boundary escape (VM/IOMMU/sandbox).\nC:N - The race only corrupts the sk_forward_alloc accounting counter; it does not provide an information disclosure or arbitrary read primitive.\nI:N - This is integer memory-accounting corruption (WARN_ON leftovers / reclaim imbalance), not an OOB write, UAF, or other primitive that yields controlled data modification or code execution.\nA:H - Corrupted sk_forward_alloc leads to sk_stream_kill_queues/inet_sock_destruct WARN_ON (and potential panic_on_warn) plus broken reclaim that can exhaust or mis-account socket memory, causing high availability impact."
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"affected": [
|
||
{
|
||
"product": "Linux",
|
||
"vendor": "Linux",
|
||
"defaultStatus": "unaffected",
|
||
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
||
"programFiles": [
|
||
"net/mptcp/protocol.c"
|
||
],
|
||
"versions": [
|
||
{
|
||
"version": "64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25",
|
||
"lessThan": "b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25",
|
||
"lessThan": "b5941f066b4ca331db225a976dae1d6ca8cf0ae3",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "96db8ffef07516a6d7414b6988f2a4298a839977",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "5.11.4",
|
||
"lessThan": "5.12",
|
||
"status": "affected",
|
||
"versionType": "semver"
|
||
}
|
||
]
|
||
},
|
||
{
|
||
"product": "Linux",
|
||
"vendor": "Linux",
|
||
"defaultStatus": "affected",
|
||
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
||
"programFiles": [
|
||
"net/mptcp/protocol.c"
|
||
],
|
||
"versions": [
|
||
{
|
||
"version": "5.12",
|
||
"status": "affected"
|
||
},
|
||
{
|
||
"version": "0",
|
||
"lessThan": "5.12",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "5.12.10",
|
||
"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": "5.12",
|
||
"versionEndExcluding": "5.12.10"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "5.12",
|
||
"versionEndExcluding": "5.13"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "5.11.4"
|
||
}
|
||
]
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"references": [
|
||
{
|
||
"url": "https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3"
|
||
},
|
||
{
|
||
"url": "https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3"
|
||
}
|
||
],
|
||
"title": "mptcp: fix sk_forward_memory corruption on retransmission",
|
||
"x_generator": {
|
||
"engine": "bippy-1.2.0"
|
||
}
|
||
},
|
||
"adp": [
|
||
{
|
||
"title": "CISA ADP Vulnrichment",
|
||
"metrics": [
|
||
{
|
||
"other": {
|
||
"type": "ssvc",
|
||
"content": {
|
||
"id": "CVE-2021-47132",
|
||
"role": "CISA Coordinator",
|
||
"options": [
|
||
{
|
||
"Exploitation": "none"
|
||
},
|
||
{
|
||
"Automatable": "no"
|
||
},
|
||
{
|
||
"Technical Impact": "partial"
|
||
}
|
||
],
|
||
"version": "2.0.3",
|
||
"timestamp": "2024-03-18T15:54:25.829185Z"
|
||
}
|
||
}
|
||
}
|
||
],
|
||
"providerMetadata": {
|
||
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
||
"shortName": "CISA-ADP",
|
||
"dateUpdated": "2024-06-04T17:14:35.969Z"
|
||
}
|
||
},
|
||
{
|
||
"providerMetadata": {
|
||
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
||
"shortName": "CVE",
|
||
"dateUpdated": "2024-08-04T05:24:40.145Z"
|
||
},
|
||
"title": "CVE Program Container",
|
||
"references": [
|
||
{
|
||
"url": "https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3",
|
||
"tags": [
|
||
"x_transferred"
|
||
]
|
||
},
|
||
{
|
||
"url": "https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3",
|
||
"tags": [
|
||
"x_transferred"
|
||
]
|
||
}
|
||
]
|
||
}
|
||
]
|
||
}
|
||
} |