CWE-77
Allowed-with-ReviewImproper Neutralization of Special Elements used in a Command ('Command Injection')
Abstraction: Class · Status: Draft
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
5381 vulnerabilities reference this CWE, most recent first.
GHSA-XJ89-HJG5-97V6
Vulnerability from github – Published: 2023-04-28 18:30 – Updated: 2026-07-09 15:31A vulnerability was found in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. It has been rated as critical. Affected by this issue is some unknown functionality of the component Web Management Interface. The manipulation of the argument suffix-rate-up leads to command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-227654 is the identifier assigned to this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2023-2378"
],
"database_specific": {
"cwe_ids": [
"CWE-74",
"CWE-77"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-28T16:15:10Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. It has been rated as critical. Affected by this issue is some unknown functionality of the component Web Management Interface. The manipulation of the argument suffix-rate-up leads to command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-227654 is the identifier assigned to this vulnerability.",
"id": "GHSA-xj89-hjg5-97v6",
"modified": "2026-07-09T15:31:51Z",
"published": "2023-04-28T18:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2378"
},
{
"type": "WEB",
"url": "https://github.com/leetsun/IoT/tree/main/EdgeRouterX/CI/4"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.227654"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.227654"
},
{
"type": "WEB",
"url": "https://vuldb.com/cve/CVE-2023-2378"
},
{
"type": "WEB",
"url": "https://vuldb.com/submit/114072"
},
{
"type": "WEB",
"url": "https://vuldb.com/vuln/227654"
},
{
"type": "WEB",
"url": "https://vuldb.com/vuln/227654/cti"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-XJ9V-6Q2F-VQHX
Vulnerability from github – Published: 2023-01-09 06:30 – Updated: 2025-04-09 19:55All versions of the package wifey are vulnerable to Command Injection via the connect() function due to improper input sanitization.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "wifey"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.0.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-25890"
],
"database_specific": {
"cwe_ids": [
"CWE-77",
"CWE-78"
],
"github_reviewed": true,
"github_reviewed_at": "2023-01-09T21:56:33Z",
"nvd_published_at": "2023-01-09T05:15:00Z",
"severity": "CRITICAL"
},
"details": "All versions of the package wifey are vulnerable to Command Injection via the `connect()` function due to improper input sanitization.",
"id": "GHSA-xj9v-6q2f-vqhx",
"modified": "2025-04-09T19:55:43Z",
"published": "2023-01-09T06:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-25890"
},
{
"type": "WEB",
"url": "https://security.snyk.io/vuln/SNYK-JS-WIFEY-3175615"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "wifey vulnerable to Command Injection due to improper input sanitization"
}
GHSA-XJG8-5473-5PJP
Vulnerability from github – Published: 2022-05-24 17:19 – Updated: 2024-04-04 02:51A vulnerability in the processing of boot options of specific Cisco IOS XE Software switches could allow an authenticated, local attacker with root shell access to the underlying operating system (OS) to conduct a command injection attack during device boot. This vulnerability is due to insufficient input validation checks while processing boot options. An attacker could exploit this vulnerability by modifying device boot options to execute attacker-provided code. A successful exploit may allow an attacker to bypass the Secure Boot process and execute malicious code on an affected device with root-level privileges.
{
"affected": [],
"aliases": [
"CVE-2020-3207"
],
"database_specific": {
"cwe_ids": [
"CWE-77",
"CWE-78"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-06-03T18:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the processing of boot options of specific Cisco IOS XE Software switches could allow an authenticated, local attacker with root shell access to the underlying operating system (OS) to conduct a command injection attack during device boot. This vulnerability is due to insufficient input validation checks while processing boot options. An attacker could exploit this vulnerability by modifying device boot options to execute attacker-provided code. A successful exploit may allow an attacker to bypass the Secure Boot process and execute malicious code on an affected device with root-level privileges.",
"id": "GHSA-xjg8-5473-5pjp",
"modified": "2024-04-04T02:51:58Z",
"published": "2022-05-24T17:19:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3207"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ngwc-cmdinj-KEwWVWR"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XJHG-M88J-HQRC
Vulnerability from github – Published: 2025-05-01 18:31 – Updated: 2025-05-02 18:31TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the CloudSrvUserdataVersionCheck function via the url parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.
{
"affected": [],
"aliases": [
"CVE-2025-44843"
],
"database_specific": {
"cwe_ids": [
"CWE-77"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-01T17:15:50Z",
"severity": "MODERATE"
},
"details": "TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the CloudSrvUserdataVersionCheck function via the url parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.",
"id": "GHSA-xjhg-m88j-hqrc",
"modified": "2025-05-02T18:31:31Z",
"published": "2025-05-01T18:31:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-44843"
},
{
"type": "WEB",
"url": "https://github.com/Summermu/VulnForIoT/tree/main/Totolink_CA600-PoE/CloudSrvUserdataVersionCheck_url/readme.md"
},
{
"type": "WEB",
"url": "https://www.totolink.net"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-XJP5-P9R4-X8C7
Vulnerability from github – Published: 2025-08-26 00:31 – Updated: 2025-08-26 18:31A command injection vulnerability in the EXE parameter of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to execute arbitrary commands via supplying a crafted GET request.
{
"affected": [],
"aliases": [
"CVE-2025-29519"
],
"database_specific": {
"cwe_ids": [
"CWE-77"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-25T15:15:37Z",
"severity": "MODERATE"
},
"details": "A command injection vulnerability in the EXE parameter of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to execute arbitrary commands via supplying a crafted GET request.",
"id": "GHSA-xjp5-p9r4-x8c7",
"modified": "2025-08-26T18:31:14Z",
"published": "2025-08-26T00:31:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-29519"
},
{
"type": "WEB",
"url": "https://gist.github.com/stevenyu113228/5cf73b94dd0f32a72f0b33b17429a423"
},
{
"type": "WEB",
"url": "https://www.dlink.com/en/security-bulletin"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-XJQ3-P9VW-4QRF
Vulnerability from github – Published: 2025-02-21 00:31 – Updated: 2025-02-21 18:31Tenda AC10 V1.0 V15.03.06.23 has a command injection vulnerablility located in the formexeCommand function. The str variable receives the cmdinput parameter from a POST request and is later assigned to the cmd_buf variable, which is directly used in the doSystemCmd function, causing an arbitrary command execution.
{
"affected": [],
"aliases": [
"CVE-2025-25675"
],
"database_specific": {
"cwe_ids": [
"CWE-77",
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-20T23:15:12Z",
"severity": "CRITICAL"
},
"details": "Tenda AC10 V1.0 V15.03.06.23 has a command injection vulnerablility located in the formexeCommand function. The str variable receives the cmdinput parameter from a POST request and is later assigned to the cmd_buf variable, which is directly used in the doSystemCmd function, causing an arbitrary command execution.",
"id": "GHSA-xjq3-p9vw-4qrf",
"modified": "2025-02-21T18:31:13Z",
"published": "2025-02-21T00:31:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-25675"
},
{
"type": "WEB",
"url": "https://github.com/jangfan/my-vuln/blob/main/Tenda/AC10V1/formexeCommand.md"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XJR7-3C3G-M763
Vulnerability from github – Published: 2026-01-13 20:29 – Updated: 2026-01-13 20:29Summary
The user-provided string depName in the gleam manager is appended to the gleam deps update command without proper sanitization.
Details
Adversaries can provide a maliciously crafted gleam.toml in conjunctions with a tweaked Renovate configuration file to trick Renovate to execute arbitrary code.
All values added to the packagesToUpdate variable in lib/modules/manager/gleam/artifacts.ts are not being escaped using the quote function from the shlex package.
This lack of proper sanitization has been present in the product since version 39.53.0 (https://github.com/renovatebot/renovate/commit/d29698e0131231652970f02765312769975e4d38), released on December 6 of 2024.
PoC
- Create a git repo with the following content:
renovate.json5:
{
$schema: "https://docs.renovatebot.com/renovate-schema.json",
customDatasources: {
always: {
defaultRegistryUrlTemplate: "https://docs.renovatebot.com/search/search_index.json",
transformTemplates: ['{"releases":[{"version":"99999.0.0"}]}'],
},
},
packageRules: [
{
// Target of the day
matchManagers: ["gleam"],
// Trick the manager in believing there's a new version
overrideDatasource: "custom.always",
},
],
}
gleam.toml:
name = "renovate-aci-2"
version = "0.0.1"
[dependencies]
"|| kill 1" = "0.1.0"
manifest.toml:
non-empty file
- Run Renovate against the repo from a Docker container. Notice that the process terminates without reporting "Repository finished", because the ACI vulnerability allowed for execution of
kill 1, terminating the root process of the container.
Impact
This is a Arbitrary Command Injection vulnerability, allowing those with write access on repositories configured to be scanned by Renovate to cause the execution of commands of their choice on the machine that runs Renovate.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "renovate"
},
"ranges": [
{
"events": [
{
"introduced": "39.53.0"
},
{
"fixed": "40.33.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-77"
],
"github_reviewed": true,
"github_reviewed_at": "2026-01-13T20:29:00Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Summary\nThe user-provided string `depName` in the `gleam` manager is appended to the `gleam deps update` command without proper sanitization.\n\n### Details\nAdversaries can provide a maliciously crafted `gleam.toml` in conjunctions with a tweaked Renovate configuration file to trick Renovate to execute arbitrary code.\nAll values added to the `packagesToUpdate` variable in [lib/modules/manager/gleam/artifacts.ts](https://github.com/renovatebot/renovate/blob/e9cbd02865b1827f7e4269c05250a12ee2203a71/lib/modules/manager/gleam/artifacts.ts) are not being escaped using the `quote` function from the `shlex` package.\nThis lack of proper sanitization has been present in the product since version 39.53.0 (https://github.com/renovatebot/renovate/commit/d29698e0131231652970f02765312769975e4d38), released on December 6 of 2024.\n\n### PoC\n1. Create a git repo with the following content:\n\n`renovate.json5`:\n\n```json5\n{\n $schema: \"https://docs.renovatebot.com/renovate-schema.json\",\n customDatasources: {\n always: {\n defaultRegistryUrlTemplate: \"https://docs.renovatebot.com/search/search_index.json\",\n transformTemplates: [\u0027{\"releases\":[{\"version\":\"99999.0.0\"}]}\u0027],\n },\n },\n packageRules: [\n {\n // Target of the day\n matchManagers: [\"gleam\"],\n // Trick the manager in believing there\u0027s a new version\n overrideDatasource: \"custom.always\",\n },\n ],\n}\n\n```\n\n\n`gleam.toml`:\n\n```toml\nname = \"renovate-aci-2\"\nversion = \"0.0.1\"\n\n[dependencies]\n\"|| kill 1\" = \"0.1.0\"\n```\n\n\n`manifest.toml`:\n\n```toml\nnon-empty file\n```\n\n2. Run Renovate against the repo from a Docker container. Notice that the process terminates without reporting \"Repository finished\", because the ACI vulnerability allowed for execution of `kill 1`, terminating the root process of the container.\n\n### Impact\nThis is a Arbitrary Command Injection vulnerability, allowing those with write access on repositories configured to be scanned by Renovate to cause the execution of commands of their choice on the machine that runs Renovate.",
"id": "GHSA-xjr7-3c3g-m763",
"modified": "2026-01-13T20:29:00Z",
"published": "2026-01-13T20:29:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/renovatebot/renovate/security/advisories/GHSA-xjr7-3c3g-m763"
},
{
"type": "PACKAGE",
"url": "https://github.com/renovatebot/renovate"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Renovate vulnerable to arbitrary command injection via gleam manager and malicious gleam.toml file"
}
GHSA-XJRJ-8PRQ-9366
Vulnerability from github – Published: 2026-02-16 03:30 – Updated: 2026-02-16 03:30A security flaw has been discovered in Wavlink WL-WN579A3 up to 20210219. Affected by this issue is the function DeleteMac of the file /cgi-bin/wireless.cgi. The manipulation of the argument delete_list results in command injection. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.
{
"affected": [],
"aliases": [
"CVE-2026-2529"
],
"database_specific": {
"cwe_ids": [
"CWE-74",
"CWE-77"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-16T02:16:07Z",
"severity": "MODERATE"
},
"details": "A security flaw has been discovered in Wavlink WL-WN579A3 up to 20210219. Affected by this issue is the function DeleteMac of the file /cgi-bin/wireless.cgi. The manipulation of the argument delete_list results in command injection. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.",
"id": "GHSA-xjrj-8prq-9366",
"modified": "2026-02-16T03:30:17Z",
"published": "2026-02-16T03:30:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2529"
},
{
"type": "WEB",
"url": "https://github.com/MRAdera/IoT-Vuls/blob/main/wavlink/wn579a3/DeleteMac.md"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.346117"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.346117"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.748076"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-XM3G-P4GQ-33VR
Vulnerability from github – Published: 2026-05-02 15:30 – Updated: 2026-05-02 15:30A vulnerability was detected in pskill9 website-downloader up to 0.1.0. This affects the function download_website of the file src/index.ts of the component MCP Interface. Performing a manipulation of the argument outputPath results in os command injection. The attack may be initiated remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
{
"affected": [],
"aliases": [
"CVE-2026-7642"
],
"database_specific": {
"cwe_ids": [
"CWE-77"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-02T15:16:14Z",
"severity": "LOW"
},
"details": "A vulnerability was detected in pskill9 website-downloader up to 0.1.0. This affects the function download_website of the file src/index.ts of the component MCP Interface. Performing a manipulation of the argument outputPath results in os command injection. The attack may be initiated remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
"id": "GHSA-xm3g-p4gq-33vr",
"modified": "2026-05-02T15:30:27Z",
"published": "2026-05-02T15:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7642"
},
{
"type": "WEB",
"url": "https://github.com/BruceJqs/public_exp/issues/31"
},
{
"type": "WEB",
"url": "https://github.com/pskill9/website-downloader/issues/7"
},
{
"type": "WEB",
"url": "https://github.com/pskill9/website-downloader"
},
{
"type": "WEB",
"url": "https://vuldb.com/submit/806812"
},
{
"type": "WEB",
"url": "https://vuldb.com/vuln/360754"
},
{
"type": "WEB",
"url": "https://vuldb.com/vuln/360754/cti"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-XM6M-F95R-5X2C
Vulnerability from github – Published: 2024-05-14 18:30 – Updated: 2024-07-04 09:32A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V5.30), SICORE Base system (All versions < V1.3.0). The web interface of affected devices is vulnerable to command injection due to missing server side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.
{
"affected": [],
"aliases": [
"CVE-2024-31485"
],
"database_specific": {
"cwe_ids": [
"CWE-77"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-14T16:16:51Z",
"severity": "HIGH"
},
"details": "A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions \u003c V5.30), SICORE Base system (All versions \u003c V1.3.0). The web interface of affected devices is vulnerable to command injection due to missing server side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.",
"id": "GHSA-xm6m-f95r-5x2c",
"modified": "2024-07-04T09:32:48Z",
"published": "2024-05-14T18:30:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-31485"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-871704.html"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Jul/4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
Mitigation
If at all possible, use library calls rather than external processes to recreate the desired functionality.
Mitigation
If possible, ensure that all external commands called from the program are statically created.
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation
Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
Mitigation
Assign permissions that prevent the user from accessing/opening privileged files.
CAPEC-136: LDAP Injection
An attacker manipulates or crafts an LDAP query for the purpose of undermining the security of the target. Some applications use user input to create LDAP queries that are processed by an LDAP server. For example, a user might provide their username during authentication and the username might be inserted in an LDAP query during the authentication process. An attacker could use this input to inject additional commands into an LDAP query that could disclose sensitive information. For example, entering a * in the aforementioned query might return information about all users on the system. This attack is very similar to an SQL injection attack in that it manipulates a query to gather additional information or coerce a particular return value.
CAPEC-15: Command Delimiters
An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or denylist input validation, as opposed to allowlist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or denylist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
CAPEC-183: IMAP/SMTP Command Injection
An adversary exploits weaknesses in input validation on web-mail servers to execute commands on the IMAP/SMTP server. Web-mail servers often sit between the Internet and the IMAP or SMTP mail server. User requests are received by the web-mail servers which then query the back-end mail server for the requested information and return this response to the user. In an IMAP/SMTP command injection attack, mail-server commands are embedded in parts of the request sent to the web-mail server. If the web-mail server fails to adequately sanitize these requests, these commands are then sent to the back-end mail server when it is queried by the web-mail server, where the commands are then executed. This attack can be especially dangerous since administrators may assume that the back-end server is protected against direct Internet access and therefore may not secure it adequately against the execution of malicious commands.
CAPEC-248: Command Injection
An adversary looking to execute a command of their choosing, injects new items into an existing command thus modifying interpretation away from what was intended. Commands in this context are often standalone strings that are interpreted by a downstream component and cause specific responses. This type of attack is possible when untrusted values are used to build these command strings. Weaknesses in input validation or command construction can enable the attack and lead to successful exploitation.
CAPEC-40: Manipulating Writeable Terminal Devices
This attack exploits terminal devices that allow themselves to be written to by other users. The attacker sends command strings to the target terminal device hoping that the target user will hit enter and thereby execute the malicious command with their privileges. The attacker can send the results (such as copying /etc/passwd) to a known directory and collect once the attack has succeeded.
CAPEC-43: Exploiting Multiple Input Interpretation Layers
An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: <parser1> --> <input validator> --> <parser2>. In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
CAPEC-75: Manipulating Writeable Configuration Files
Generally these are manually edited files that are not in the preview of the system administrators, any ability on the attackers' behalf to modify these files, for example in a CVS repository, gives unauthorized access directly to the application, the same as authorized users.
CAPEC-76: Manipulating Web Input to File System Calls
An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.