gsd-2021-4159
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-4159",
"description": "A vulnerability was found in the Linux kernel\u0027s EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.",
"id": "GSD-2021-4159",
"references": [
"https://www.suse.com/security/cve/CVE-2021-4159.html",
"https://alas.aws.amazon.com/cve/html/CVE-2021-4159.html",
"https://ubuntu.com/security/CVE-2021-4159"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-4159"
],
"details": "A vulnerability was found in the Linux kernel\u0027s EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.",
"id": "GSD-2021-4159",
"modified": "2023-12-13T01:23:11.785448Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
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"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2021-4159",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "kernel",
"version": {
"version_data": [
{
"version_affected": "=",
"version_value": "Fixed in v5.7-rc1"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A vulnerability was found in the Linux kernel\u0027s EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel."
}
]
},
"problemtype": {
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{
"description": [
{
"cweId": "CWE-202",
"lang": "eng",
"value": "CWE-202 - Exposure of Sensitive Information Through Data Queries"
}
]
}
]
},
"references": {
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{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=2036024",
"refsource": "MISC",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2036024"
},
{
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"url": "https://access.redhat.com/security/cve/CVE-2021-4159"
},
{
"name": "https://security-tracker.debian.org/tracker/CVE-2021-4159",
"refsource": "MISC",
"url": "https://security-tracker.debian.org/tracker/CVE-2021-4159"
},
{
"name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd",
"refsource": "MISC",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd"
},
{
"name": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html",
"refsource": "MISC",
"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
}
]
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "5.7",
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
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],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
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"cve": {
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"ID": "CVE-2021-4159"
},
"data_format": "MITRE",
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"data_version": "4.0",
"description": {
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"value": "A vulnerability was found in the Linux kernel\u0027s EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://access.redhat.com/security/cve/CVE-2021-4159",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/security/cve/CVE-2021-4159"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=2036024",
"refsource": "MISC",
"tags": [
"Issue Tracking"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2036024"
},
{
"name": "https://security-tracker.debian.org/tracker/CVE-2021-4159",
"refsource": "MISC",
"tags": [
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],
"url": "https://security-tracker.debian.org/tracker/CVE-2021-4159"
},
{
"name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd",
"refsource": "MISC",
"tags": [
"Mailing List",
"Patch",
"Vendor Advisory"
],
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=294f2fc6da27620a506e6c050241655459ccd6bd"
},
{
"name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update",
"refsource": "MLIST",
"tags": [
"Mailing List",
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],
"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
}
]
}
},
"impact": {
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 4.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 0.8,
"impactScore": 3.6
}
},
"lastModifiedDate": "2022-10-06T15:30Z",
"publishedDate": "2022-08-24T16:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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