msrc_cve-2021-44964
Vulnerability from csaf_microsoft
Published
2022-03-02 00:00
Modified
2025-07-11 00:00
Summary
Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.
Notes
Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
{
"document": {
"category": "csaf_vex",
"csaf_version": "2.0",
"distribution": {
"text": "Public",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en-US",
"notes": [
{
"category": "general",
"text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
}
],
"publisher": {
"category": "vendor",
"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
"namespace": "https://msrc.microsoft.com"
},
"references": [
{
"category": "self",
"summary": "CVE-2021-44964 Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-44964.json"
},
{
"category": "external",
"summary": "Microsoft Support Lifecycle",
"url": "https://support.microsoft.com/lifecycle"
},
{
"category": "external",
"summary": "Common Vulnerability Scoring System",
"url": "https://www.first.org/cvss"
}
],
"title": "Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.",
"tracking": {
"current_release_date": "2025-07-11T00:00:00.000Z",
"generator": {
"date": "2025-10-19T23:23:33.133Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2021-44964",
"initial_release_date": "2022-03-02T00:00:00.000Z",
"revision_history": [
{
"date": "2022-03-21T00:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2023-06-03T00:00:00.000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Information published."
},
{
"date": "2025-07-11T00:00:00.000Z",
"legacy_version": "2",
"number": "3",
"summary": "Added memcached to CBL-Mariner 2.0\nAdded ntopng to CBL-Mariner 2.0\nAdded lua to CBL-Mariner 2.0"
}
],
"status": "final",
"version": "3"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "2.0",
"product": {
"name": "CBL Mariner 2.0",
"product_id": "17086"
}
},
{
"category": "product_version",
"name": "3.0",
"product": {
"name": "Azure Linux 3.0",
"product_id": "17084"
}
}
],
"category": "product_name",
"name": "Azure Linux"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003ccbl2 lua 5.4.4-1",
"product": {
"name": "\u003ccbl2 lua 5.4.4-1",
"product_id": "3"
}
},
{
"category": "product_version",
"name": "cbl2 lua 5.4.4-1",
"product": {
"name": "cbl2 lua 5.4.4-1",
"product_id": "19468"
}
}
],
"category": "product_name",
"name": "lua"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003ccbl2 ntopng 5.2.1-3",
"product": {
"name": "\u003ccbl2 ntopng 5.2.1-3",
"product_id": "2"
}
},
{
"category": "product_version",
"name": "cbl2 ntopng 5.2.1-3",
"product": {
"name": "cbl2 ntopng 5.2.1-3",
"product_id": "19878"
}
}
],
"category": "product_name",
"name": "ntopng"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003ccbl2 memcached 1.6.22-2",
"product": {
"name": "\u003ccbl2 memcached 1.6.22-2",
"product_id": "1"
}
},
{
"category": "product_version",
"name": "cbl2 memcached 1.6.22-2",
"product": {
"name": "cbl2 memcached 1.6.22-2",
"product_id": "19882"
}
}
],
"category": "product_name",
"name": "memcached"
}
],
"category": "vendor",
"name": "Microsoft"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccbl2 lua 5.4.4-1 as a component of CBL Mariner 2.0",
"product_id": "17086-3"
},
"product_reference": "3",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 lua 5.4.4-1 as a component of CBL Mariner 2.0",
"product_id": "19468-17086"
},
"product_reference": "19468",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccbl2 ntopng 5.2.1-3 as a component of CBL Mariner 2.0",
"product_id": "17086-2"
},
"product_reference": "2",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 ntopng 5.2.1-3 as a component of CBL Mariner 2.0",
"product_id": "19878-17086"
},
"product_reference": "19878",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccbl2 memcached 1.6.22-2 as a component of CBL Mariner 2.0",
"product_id": "17086-1"
},
"product_reference": "1",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 memcached 1.6.22-2 as a component of CBL Mariner 2.0",
"product_id": "19882-17086"
},
"product_reference": "19882",
"relates_to_product_reference": "17086"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2021-44964",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"notes": [
{
"category": "general",
"text": "mitre",
"title": "Assigning CNA"
}
],
"product_status": {
"fixed": [
"19468-17086",
"19878-17086",
"19882-17086"
],
"known_affected": [
"17086-3",
"17086-2",
"17086-1"
],
"under_investigation": [
"17084-5",
"17084-4"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2021-44964 Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-44964.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2022-03-21T00:00:00.000Z",
"details": "5.4.4-1:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
"product_ids": [
"17086-3"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
},
{
"category": "vendor_fix",
"date": "2022-03-21T00:00:00.000Z",
"details": "5.2.1-3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
"product_ids": [
"17086-2"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
},
{
"category": "vendor_fix",
"date": "2022-03-21T00:00:00.000Z",
"details": "1.6.22-2:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
"product_ids": [
"17086-1"
],
"url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"environmentalsScore": 0.0,
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"temporalScore": 6.3,
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"17086-3",
"17086-2",
"17086-1"
]
}
],
"title": "Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file."
}
]
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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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