CVE-2021-3490 (GCVE-0-2021-3490)
Vulnerability from cvelistv5 – Published: 2021-06-04 01:40 – Updated: 2024-09-16 22:29
VLAI?
Title
Linux kernel eBPF bitwise ops ALU32 bounds tracking
Summary
The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-rc1).
Severity ?
7.8 (High)
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux kernel |
Affected:
trunk , < v5.13-rc4
(custom)
Affected: linux-5.12.y , < v5.12.4 (custom) Affected: linux-5.11.y , < v5.11.21 (custom) Affected: linux-5.10.y , < v5.10.37 (custom) Affected: v5.7-rc1 , < 5.7* (custom) |
Credits
Manfred Paul (@_manfp) of the RedRocket CTF team (@redrocket_ctf) working with Trend Micro's Zero Day Initiative
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T16:53:17.879Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU",
"x_transferred"
],
"url": "https://ubuntu.com/security/notices/USN-4950-1"
},
{
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU",
"x_transferred"
],
"url": "https://ubuntu.com/security/notices/USN-4949-1"
},
{
"name": "[oss-security] CVE-2021-3490 - Linux kernel eBPF bitwise ops ALU32 bounds tracking",
"tags": [
"mailing-list",
"x_refsource_MLIST",
"x_transferred"
],
"url": "https://www.openwall.com/lists/oss-security/2021/05/11/11"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-606/"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Linux kernel",
"vendor": "Linux",
"versions": [
{
"lessThan": "v5.13-rc4",
"status": "affected",
"version": "trunk",
"versionType": "custom"
},
{
"lessThan": "v5.12.4",
"status": "affected",
"version": "linux-5.12.y",
"versionType": "custom"
},
{
"lessThan": "v5.11.21",
"status": "affected",
"version": "linux-5.11.y",
"versionType": "custom"
},
{
"lessThan": "v5.10.37",
"status": "affected",
"version": "linux-5.10.y",
"versionType": "custom"
},
{
"lessThan": "5.7*",
"status": "affected",
"version": "v5.7-rc1",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Manfred Paul (@_manfp) of the RedRocket CTF team (@redrocket_ctf) working with Trend Micro\u0027s Zero Day Initiative"
}
],
"datePublic": "2021-05-11T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (\"bpf: Fix alu32 const subreg bound tracking on bitwise operations\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (\"bpf: Verifier, do explicit ALU32 bounds tracking\") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (\"bpf:Fix a verifier failure with xor\") ( 5.10-rc1)."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787 Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20 Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-09-01T17:06:42.000Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU"
],
"url": "https://ubuntu.com/security/notices/USN-4950-1"
},
{
"tags": [
"vendor-advisory",
"x_refsource_UBUNTU"
],
"url": "https://ubuntu.com/security/notices/USN-4949-1"
},
{
"name": "[oss-security] CVE-2021-3490 - Linux kernel eBPF bitwise ops ALU32 bounds tracking",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://www.openwall.com/lists/oss-security/2021/05/11/11"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-606/"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Linux kernel eBPF bitwise ops ALU32 bounds tracking",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@ubuntu.com",
"DATE_PUBLIC": "2021-05-11 17:00:00 +0000",
"ID": "CVE-2021-3490",
"STATE": "PUBLIC",
"TITLE": "Linux kernel eBPF bitwise ops ALU32 bounds tracking"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Linux kernel",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "trunk",
"version_value": "v5.13-rc4"
},
{
"version_affected": "\u003c",
"version_name": "linux-5.12.y",
"version_value": "v5.12.4"
},
{
"version_affected": "\u003c",
"version_name": "linux-5.11.y",
"version_value": "v5.11.21"
},
{
"version_affected": "\u003c",
"version_name": "linux-5.10.y",
"version_value": "v5.10.37"
},
{
"version_affected": "\u003e=",
"version_name": "5.7",
"version_value": "v5.7-rc1"
}
]
}
}
]
},
"vendor_name": "Linux"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Manfred Paul (@_manfp) of the RedRocket CTF team (@redrocket_ctf) working with Trend Micro\u0027s Zero Day Initiative"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (\"bpf: Fix alu32 const subreg bound tracking on bitwise operations\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (\"bpf: Verifier, do explicit ALU32 bounds tracking\") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (\"bpf:Fix a verifier failure with xor\") ( 5.10-rc1)."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-787 Out-of-bounds Write"
}
]
},
{
"description": [
{
"lang": "eng",
"value": "CWE-20 Improper Input Validation"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://ubuntu.com/security/notices/USN-4950-1",
"refsource": "UBUNTU",
"url": "https://ubuntu.com/security/notices/USN-4950-1"
},
{
"name": "https://ubuntu.com/security/notices/USN-4949-1",
"refsource": "UBUNTU",
"url": "https://ubuntu.com/security/notices/USN-4949-1"
},
{
"name": "[oss-security] CVE-2021-3490 - Linux kernel eBPF bitwise ops ALU32 bounds tracking",
"refsource": "MLIST",
"url": "https://www.openwall.com/lists/oss-security/2021/05/11/11"
},
{
"name": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e",
"refsource": "MISC",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e"
},
{
"name": "https://www.zerodayinitiative.com/advisories/ZDI-21-606/",
"refsource": "MISC",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-606/"
},
{
"name": "https://security.netapp.com/advisory/ntap-20210716-0004/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
},
{
"name": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html",
"refsource": "MISC",
"url": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html"
}
]
},
"source": {
"discovery": "EXTERNAL"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2021-3490",
"datePublished": "2021-06-04T01:40:20.129Z",
"dateReserved": "2021-04-09T00:00:00.000Z",
"dateUpdated": "2024-09-16T22:29:57.625Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…