GSD-2023-26158
Vulnerability from gsd - Updated: 2023-12-13 01:20Details
All versions of the package mockjs are vulnerable to Prototype Pollution via the Util.extend function due to missing check if the attribute resolves to the object prototype. By adding or modifying attributes of an object prototype, it is possible to create attributes that exist on every object, or replace critical attributes with malicious ones. This can be problematic if the software depends on existence or non-existence of certain attributes, or uses pre-defined attributes of object prototype (such as hasOwnProperty, toString or valueOf).
User controlled inputs inside the extend() method of the Mock.Handler, Mock.Random, Mock.RE.Handler or Mock.Util, will allow an attacker to exploit this vulnerability.
Workaround
By using a denylist of dangerous attributes, this weakness can be eliminated.
Add the following line in the Util.extend function:
js
js if (["__proto__", "constructor", "prototype"].includes(name)) continue
js
// src/mock/handler.js
Util.extend = function extend() {
var target = arguments[0] || {},
i = 1,
length = arguments.length,
options, name, src, copy, clone
if (length === 1) {
target = this
i = 0
}
for (; i < length; i++) {
options = arguments[i]
if (!options) continue
for (name in options) {
if (["__proto__", "constructor", "prototype"].includes(name)) continue
src = target[name]
copy = options[name]
if (target === copy) continue
if (copy === undefined) continue
if (Util.isArray(copy) || Util.isObject(copy)) {
if (Util.isArray(copy)) clone = src && Util.isArray(src) ? src : []
if (Util.isObject(copy)) clone = src && Util.isObject(src) ? src : {}
target[name] = Util.extend(clone, copy)
} else {
target[name] = copy
}
}
}
return target
}
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2023-26158",
"id": "GSD-2023-26158"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2023-26158"
],
"details": "All versions of the package mockjs are vulnerable to Prototype Pollution via the Util.extend function due to missing check if the attribute resolves to the object prototype. By adding or modifying attributes of an object prototype, it is possible to create attributes that exist on every object, or replace critical attributes with malicious ones. This can be problematic if the software depends on existence or non-existence of certain attributes, or uses pre-defined attributes of object prototype (such as hasOwnProperty, toString or valueOf).\r\rUser controlled inputs inside the extend() method of the Mock.Handler, Mock.Random, Mock.RE.Handler or Mock.Util, will allow an attacker to exploit this vulnerability.\r\r Workaround\r\rBy using a denylist of dangerous attributes, this weakness can be eliminated.\r\rAdd the following line in the Util.extend function:\r\rjs\rjs if ([\"__proto__\", \"constructor\", \"prototype\"].includes(name)) continue\r\r\rjs\r// src/mock/handler.js\rUtil.extend = function extend() {\r var target = arguments[0] || {},\r i = 1,\r length = arguments.length,\r options, name, src, copy, clone\r\r if (length === 1) {\r target = this\r i = 0\r }\r\r for (; i \u003c length; i++) {\r options = arguments[i]\r if (!options) continue\r\r for (name in options) {\r if ([\"__proto__\", \"constructor\", \"prototype\"].includes(name)) continue\r src = target[name]\r copy = options[name]\r\r if (target === copy) continue\r if (copy === undefined) continue\r\r if (Util.isArray(copy) || Util.isObject(copy)) {\r if (Util.isArray(copy)) clone = src \u0026\u0026 Util.isArray(src) ? src : []\r if (Util.isObject(copy)) clone = src \u0026\u0026 Util.isObject(src) ? src : {}\r\r target[name] = Util.extend(clone, copy)\r } else {\r target[name] = copy\r }\r }\r }\r\r return target\r }\r",
"id": "GSD-2023-26158",
"modified": "2023-12-13T01:20:53.509591Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "report@snyk.io",
"ID": "CVE-2023-26158",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "mockjs",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "0",
"version_value": "*"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"credits": [
{
"lang": "en",
"value": "Timothee Desurmont"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "All versions of the package mockjs are vulnerable to Prototype Pollution via the Util.extend function due to missing check if the attribute resolves to the object prototype. By adding or modifying attributes of an object prototype, it is possible to create attributes that exist on every object, or replace critical attributes with malicious ones. This can be problematic if the software depends on existence or non-existence of certain attributes, or uses pre-defined attributes of object prototype (such as hasOwnProperty, toString or valueOf).\r\rUser controlled inputs inside the extend() method of the Mock.Handler, Mock.Random, Mock.RE.Handler or Mock.Util, will allow an attacker to exploit this vulnerability.\r\r Workaround\r\rBy using a denylist of dangerous attributes, this weakness can be eliminated.\r\rAdd the following line in the Util.extend function:\r\rjs\rjs if ([\"__proto__\", \"constructor\", \"prototype\"].includes(name)) continue\r\r\rjs\r// src/mock/handler.js\rUtil.extend = function extend() {\r var target = arguments[0] || {},\r i = 1,\r length = arguments.length,\r options, name, src, copy, clone\r\r if (length === 1) {\r target = this\r i = 0\r }\r\r for (; i \u003c length; i++) {\r options = arguments[i]\r if (!options) continue\r\r for (name in options) {\r if ([\"__proto__\", \"constructor\", \"prototype\"].includes(name)) continue\r src = target[name]\r copy = options[name]\r\r if (target === copy) continue\r if (copy === undefined) continue\r\r if (Util.isArray(copy) || Util.isObject(copy)) {\r if (Util.isArray(copy)) clone = src \u0026\u0026 Util.isArray(src) ? src : []\r if (Util.isObject(copy)) clone = src \u0026\u0026 Util.isObject(src) ? src : {}\r\r target[name] = Util.extend(clone, copy)\r } else {\r target[name] = copy\r }\r }\r }\r\r return target\r }\r"
}
]
},
"impact": {
"cvss": [
{
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:P",
"version": "3.1"
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"cweId": "CWE-1321",
"lang": "eng",
"value": "Prototype Pollution"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://security.snyk.io/vuln/SNYK-JS-MOCKJS-6051365",
"refsource": "MISC",
"url": "https://security.snyk.io/vuln/SNYK-JS-MOCKJS-6051365"
},
{
"name": "https://github.com/nuysoft/Mock/blob/00ce04b92eb464e664a4438430903f2de96efb47/dist/mock.js%23L721-L755",
"refsource": "MISC",
"url": "https://github.com/nuysoft/Mock/blob/00ce04b92eb464e664a4438430903f2de96efb47/dist/mock.js%23L721-L755"
}
]
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:mockjs:mock.js:*:*:*:*:*:node.js:*:*",
"cpe_name": [],
"versionEndIncluding": "1.1.0",
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "report@snyk.io",
"ID": "CVE-2023-26158"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "All versions of the package mockjs are vulnerable to Prototype Pollution via the Util.extend function due to missing check if the attribute resolves to the object prototype. By adding or modifying attributes of an object prototype, it is possible to create attributes that exist on every object, or replace critical attributes with malicious ones. This can be problematic if the software depends on existence or non-existence of certain attributes, or uses pre-defined attributes of object prototype (such as hasOwnProperty, toString or valueOf).\r\rUser controlled inputs inside the extend() method of the Mock.Handler, Mock.Random, Mock.RE.Handler or Mock.Util, will allow an attacker to exploit this vulnerability.\r\r Workaround\r\rBy using a denylist of dangerous attributes, this weakness can be eliminated.\r\rAdd the following line in the Util.extend function:\r\rjs\rjs if ([\"__proto__\", \"constructor\", \"prototype\"].includes(name)) continue\r\r\rjs\r// src/mock/handler.js\rUtil.extend = function extend() {\r var target = arguments[0] || {},\r i = 1,\r length = arguments.length,\r options, name, src, copy, clone\r\r if (length === 1) {\r target = this\r i = 0\r }\r\r for (; i \u003c length; i++) {\r options = arguments[i]\r if (!options) continue\r\r for (name in options) {\r if ([\"__proto__\", \"constructor\", \"prototype\"].includes(name)) continue\r src = target[name]\r copy = options[name]\r\r if (target === copy) continue\r if (copy === undefined) continue\r\r if (Util.isArray(copy) || Util.isObject(copy)) {\r if (Util.isArray(copy)) clone = src \u0026\u0026 Util.isArray(src) ? src : []\r if (Util.isObject(copy)) clone = src \u0026\u0026 Util.isObject(src) ? src : {}\r\r target[name] = Util.extend(clone, copy)\r } else {\r target[name] = copy\r }\r }\r }\r\r return target\r }\r"
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-1321"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://security.snyk.io/vuln/SNYK-JS-MOCKJS-6051365",
"refsource": "",
"tags": [
"Exploit",
"Mitigation",
"Third Party Advisory"
],
"url": "https://security.snyk.io/vuln/SNYK-JS-MOCKJS-6051365"
},
{
"name": "https://github.com/nuysoft/Mock/blob/00ce04b92eb464e664a4438430903f2de96efb47/dist/mock.js%23L721-L755",
"refsource": "",
"tags": [
"Broken Link"
],
"url": "https://github.com/nuysoft/Mock/blob/00ce04b92eb464e664a4438430903f2de96efb47/dist/mock.js%23L721-L755"
}
]
}
},
"impact": {
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 4.2
}
},
"lastModifiedDate": "2023-12-12T22:26Z",
"publishedDate": "2023-12-08T05:15Z"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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…