msrc_cve-2024-53920
Vulnerability from csaf_microsoft
Published
2024-11-02 00:00
Modified
2025-03-27 00:00
Summary
In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)
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-2024-53920 In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.) - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-53920.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": "In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)",
"tracking": {
"current_release_date": "2025-03-27T00:00:00.000Z",
"generator": {
"date": "2025-10-20T02:32:19.015Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2024-53920",
"initial_release_date": "2024-11-02T00:00:00.000Z",
"revision_history": [
{
"date": "2025-03-25T00:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2025-03-27T00:00:00.000Z",
"legacy_version": "2",
"number": "2",
"summary": "Information published."
}
],
"status": "final",
"version": "2"
}
},
"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 emacs 29.4-3",
"product": {
"name": "\u003ccbl2 emacs 29.4-3",
"product_id": "3"
}
},
{
"category": "product_version",
"name": "cbl2 emacs 29.4-3",
"product": {
"name": "cbl2 emacs 29.4-3",
"product_id": "17168"
}
},
{
"category": "product_version_range",
"name": "\u003cazl3 emacs 29.4-3",
"product": {
"name": "\u003cazl3 emacs 29.4-3",
"product_id": "2"
}
},
{
"category": "product_version",
"name": "azl3 emacs 29.4-3",
"product": {
"name": "azl3 emacs 29.4-3",
"product_id": "17557"
}
},
{
"category": "product_version_range",
"name": "\u003ccbl2 emacs 29.4-3",
"product": {
"name": "\u003ccbl2 emacs 29.4-3",
"product_id": "1"
}
},
{
"category": "product_version",
"name": "cbl2 emacs 29.4-3",
"product": {
"name": "cbl2 emacs 29.4-3",
"product_id": "19745"
}
}
],
"category": "product_name",
"name": "emacs"
}
],
"category": "vendor",
"name": "Microsoft"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccbl2 emacs 29.4-3 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 emacs 29.4-3 as a component of CBL Mariner 2.0",
"product_id": "17168-17086"
},
"product_reference": "17168",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003cazl3 emacs 29.4-3 as a component of Azure Linux 3.0",
"product_id": "17084-2"
},
"product_reference": "2",
"relates_to_product_reference": "17084"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "azl3 emacs 29.4-3 as a component of Azure Linux 3.0",
"product_id": "17557-17084"
},
"product_reference": "17557",
"relates_to_product_reference": "17084"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "\u003ccbl2 emacs 29.4-3 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 emacs 29.4-3 as a component of CBL Mariner 2.0",
"product_id": "19745-17086"
},
"product_reference": "19745",
"relates_to_product_reference": "17086"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2024-53920",
"cwe": {
"id": "CWE-94",
"name": "Improper Control of Generation of Code (\u0026#39;Code Injection\u0026#39;)"
},
"notes": [
{
"category": "general",
"text": "mitre",
"title": "Assigning CNA"
}
],
"product_status": {
"fixed": [
"17168-17086",
"17557-17084",
"19745-17086"
],
"known_affected": [
"17086-3",
"17084-2",
"17086-1"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2024-53920 In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.) - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-53920.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2025-03-25T00:00:00.000Z",
"details": "29.4-3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
"product_ids": [
"17086-3",
"17084-2",
"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": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"temporalScore": 7.8,
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"17086-3",
"17084-2",
"17086-1"
]
}
],
"title": "In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)"
}
]
}
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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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