330 lines
17 KiB
JSON
330 lines
17 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2021-46999",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2024-02-27T18:42:55.950Z",
|
|
"datePublished": "2024-02-28T08:13:22.256Z",
|
|
"dateUpdated": "2026-08-05T08:45:28.974Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T08:45:28.974Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: do asoc update earlier in sctp_sf_do_dupcook_a\n\nThere's a panic that occurs in a few of envs, the call trace is as below:\n\n [] general protection fault, ... 0x29acd70f1000a: 0000 [#1] SMP PTI\n [] RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0x4b/0x1fa [sctp]\n [] sctp_assoc_control_transport+0x1b9/0x210 [sctp]\n [] sctp_do_8_2_transport_strike.isra.16+0x15c/0x220 [sctp]\n [] sctp_cmd_interpreter.isra.21+0x1231/0x1a10 [sctp]\n [] sctp_do_sm+0xc3/0x2a0 [sctp]\n [] sctp_generate_timeout_event+0x81/0xf0 [sctp]\n\nThis is caused by a transport use-after-free issue. When processing a\nduplicate COOKIE-ECHO chunk in sctp_sf_do_dupcook_a(), both COOKIE-ACK\nand SHUTDOWN chunks are allocated with the transort from the new asoc.\nHowever, later in the sideeffect machine, the old asoc is used to send\nthem out and old asoc's shutdown_last_sent_to is set to the transport\nthat SHUTDOWN chunk attached to in sctp_cmd_setup_t2(), which actually\nbelongs to the new asoc. After the new_asoc is freed and the old asoc\nT2 timeout, the old asoc's shutdown_last_sent_to that is already freed\nwould be accessed in sctp_sf_t2_timer_expire().\n\nThanks Alexander and Jere for helping dig into this issue.\n\nTo fix it, this patch is to do the asoc update first, then allocate\nthe COOKIE-ACK and SHUTDOWN chunks with the 'updated' old asoc. This\nwould make more sense, as a chunk from an asoc shouldn't be sent out\nwith another asoc. We had fixed quite a few issues caused by this."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
|
|
"baseScore": 9.8,
|
|
"baseSeverity": "CRITICAL"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:N - The bug is in SCTP COOKIE-ECHO processing on the packet receive path (sctp_rcv → sctp_sf_do_5_2_4_dupcook → sctp_sf_do_dupcook_a); a remote peer triggers it by sending SCTP packets over IP.\nAC:L - A peer can observe SHUTDOWN, withhold SHUTDOWN-ACK to keep the victim in SHUTDOWN_SENT, then complete a restart INIT/COOKIE-ECHO exchange; the attacker controls both the timing and the packets that create the UAF.\nPR:N - No local privileges are required—any remote SCTP client that completes a normal association handshake can send the restart COOKIE-ECHO; cookie HMAC is protocol anti-DoS, not OS authentication.\nUI:N - Exploitation requires only attacker-sent SCTP packets; no victim user action beyond ordinary association close is needed.\nS:U - Impact stays within the vulnerable host kernel (transport UAF / privilege escalation or crash); it does not cross a VM, IOMMU, or other security boundary.\nC:H - This is a heap use-after-free of an sctp_transport; freed object reuse can yield arbitrary kernel read primitives.\nI:H - The same transport UAF enables heap spraying and write/control-flow hijacking primitives for integrity compromise or code execution.\nA:H - The bug causes a reproducible kernel general protection fault / panic when the T2 timer later dereferences the freed transport."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/sctp/sm_statefuns.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "db8bf823e70f239372c62f13e4eb6f08a1665e8c",
|
|
"lessThan": "d624f2991b977821375fbd56c91b0c91d456a697",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "a204d577be70e0a0a6023cf1b9859c9ebffaeecd",
|
|
"lessThan": "b1b31948c0af44628e43353828453461bb74098f",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c",
|
|
"lessThan": "f01988ecf3654f805282dce2d3bb9afe68d2691e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c",
|
|
"lessThan": "61b877bad9bb0d82b7d8841be50872557090a704",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c",
|
|
"lessThan": "0bfd913c2121b3d553bfd52810fe6061d542d625",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "145cb2f7177d94bc54563ed26027e952ee0ae03c",
|
|
"lessThan": "35b4f24415c854cd718ccdf38dbea6297f010aae",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "a5ce8531ea508d270822b2bc6140c6198c8a2a7b",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "4.19.123",
|
|
"lessThan": "4.19.191",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.4.41",
|
|
"lessThan": "5.4.120",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.6.13",
|
|
"lessThan": "5.7",
|
|
"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/sctp/sm_statefuns.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "5.7",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "5.7",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "4.19.191",
|
|
"lessThanOrEqual": "4.19.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.4.120",
|
|
"lessThanOrEqual": "5.4.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.38",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.11.22",
|
|
"lessThanOrEqual": "5.11.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.12.5",
|
|
"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": "4.19.123",
|
|
"versionEndExcluding": "4.19.191"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.4.41",
|
|
"versionEndExcluding": "5.4.120"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "5.10.38"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "5.11.22"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "5.12.5"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.7",
|
|
"versionEndExcluding": "5.13"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.6.13"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/d624f2991b977821375fbd56c91b0c91d456a697"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b1b31948c0af44628e43353828453461bb74098f"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f01988ecf3654f805282dce2d3bb9afe68d2691e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/61b877bad9bb0d82b7d8841be50872557090a704"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0bfd913c2121b3d553bfd52810fe6061d542d625"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/35b4f24415c854cd718ccdf38dbea6297f010aae"
|
|
}
|
|
],
|
|
"title": "sctp: do asoc update earlier in sctp_sf_do_dupcook_a",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2024-06-21T16:28:23.491999Z",
|
|
"id": "CVE-2021-46999",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2024-06-21T16:28:34.904Z"
|
|
}
|
|
},
|
|
{
|
|
"providerMetadata": {
|
|
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
|
"shortName": "CVE",
|
|
"dateUpdated": "2024-08-04T05:24:37.916Z"
|
|
},
|
|
"title": "CVE Program Container",
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/d624f2991b977821375fbd56c91b0c91d456a697",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b1b31948c0af44628e43353828453461bb74098f",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f01988ecf3654f805282dce2d3bb9afe68d2691e",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/61b877bad9bb0d82b7d8841be50872557090a704",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0bfd913c2121b3d553bfd52810fe6061d542d625",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/35b4f24415c854cd718ccdf38dbea6297f010aae",
|
|
"tags": [
|
|
"x_transferred"
|
|
]
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |