Common Weakness Enumeration

CWE-77

Allowed-with-Review

Improper 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.

5386 vulnerabilities reference this CWE, most recent first.

GHSA-QWR5-5V38-5GF5

Vulnerability from github – Published: 2022-05-24 17:31 – Updated: 2022-05-24 17:31
VLAI
Details

An arbitrary command execution vulnerability exists in the fopen() function of file writes of UCMS v1.4.8, where an attacker can gain access to the server.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2020-25483"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-10-23T18:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "An arbitrary command execution vulnerability exists in the fopen() function of file writes of UCMS v1.4.8, where an attacker can gain access to the server.",
  "id": "GHSA-qwr5-5v38-5gf5",
  "modified": "2022-05-24T17:31:58Z",
  "published": "2022-05-24T17:31:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25483"
    },
    {
      "type": "WEB",
      "url": "https://sunian19.github.io/2020/09/08/UCMS%20v.1.4.8%20Command%20execution"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-QWRP-93VH-6RC7

Vulnerability from github – Published: 2026-04-23 21:31 – Updated: 2026-04-23 21:31
VLAI
Details

An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the dhcpMtu parameter to /cgi-bin/cstecgi.cgi.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-31163"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-23T19:17:24Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the dhcpMtu parameter to /cgi-bin/cstecgi.cgi.",
  "id": "GHSA-qwrp-93vh-6rc7",
  "modified": "2026-04-23T21:31:22Z",
  "published": "2026-04-23T21:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31163"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-dhcp-mtu-cmd-injection"
    }
  ],
  "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-QWV6-2VXV-H2VG

Vulnerability from github – Published: 2023-03-22 06:30 – Updated: 2023-03-29 15:30
VLAI
Details

An authenticated remote code execution vulnerability exists in the AOS-CX Network Analytics Engine. Successful exploitation of this vulnerability results in the ability to execute arbitrary code as a privileged user on the underlying operating system, leading to a complete compromise of the switch running AOS-CX.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-1168"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-03-22T06:15:00Z",
    "severity": "HIGH"
  },
  "details": "An authenticated remote code execution vulnerability exists in the AOS-CX Network Analytics Engine. Successful exploitation of this vulnerability results in the ability to execute arbitrary code as a privileged user on the underlying operating system, leading to a complete compromise of the switch running AOS-CX.",
  "id": "GHSA-qwv6-2vxv-h2vg",
  "modified": "2023-03-29T15:30:18Z",
  "published": "2023-03-22T06:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1168"
    },
    {
      "type": "WEB",
      "url": "https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2023-004.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QWWF-J766-5G2P

Vulnerability from github – Published: 2025-07-16 09:31 – Updated: 2025-07-16 09:31
VLAI
Details

Successful exploitation of the vulnerability could allow an attacker with administrator credentials for the access point to inject malicious JavaScript into the payload of web traffics, potentially leading to session hijacking and denial-of-service (DoS).

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-52687"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-16T07:15:21Z",
    "severity": "LOW"
  },
  "details": "Successful exploitation of the vulnerability could allow an attacker with administrator credentials for the access point to inject malicious JavaScript into the payload of web traffics, potentially leading to session hijacking and denial-of-service (DoS).",
  "id": "GHSA-qwwf-j766-5g2p",
  "modified": "2025-07-16T09:31:03Z",
  "published": "2025-07-16T09:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52687"
    },
    {
      "type": "WEB",
      "url": "https://www.al-enterprise.com/-/media/assets/internet/documents/sa-n0150-omniaccess-stellar-multiple-vulnerabilities.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2025-072"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QWX8-2RQW-PP6Q

Vulnerability from github – Published: 2026-03-20 21:31 – Updated: 2026-03-20 21:31
VLAI
Details

A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-4497"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77",
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-20T19:16:20Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.",
  "id": "GHSA-qwx8-2rqw-pp6q",
  "modified": "2026-03-20T21:31:28Z",
  "published": "2026-03-20T21:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4497"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hellonestor/killallbug/issues/1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/user-attachments/files/25790616/Unauthenticated.Remote.Code.Execution.in.TOTOLINK.WA300.via.Command.Injection.in.recvUpgradeNewFw.zip"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.352046"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.352046"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.773875"
    },
    {
      "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:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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-QX27-H95H-M8MH

Vulnerability from github – Published: 2022-05-13 01:35 – Updated: 2022-05-13 01:35
VLAI
Details

A vulnerability in the Zero Touch Provisioning (ZTP) subsystem of the Cisco SD-WAN Solution could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by authenticating to the device and submitting malicious input to the affected parameter. The attacker must be authenticated to access the affected parameter. A successful exploit could allow an attacker to execute commands with root privileges. This vulnerability affects the following Cisco products if they are running a release of the Cisco SD-WAN Solution prior to Release 18.3.0: vEdge 100 Series Routers, vEdge 1000 Series Routers, vEdge 2000 Series Routers, vEdge 5000 Series Routers. Cisco Bug IDs: CSCvi69906.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-0347"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-07-18T23:29:00Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the Zero Touch Provisioning (ZTP) subsystem of the Cisco SD-WAN Solution could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by authenticating to the device and submitting malicious input to the affected parameter. The attacker must be authenticated to access the affected parameter. A successful exploit could allow an attacker to execute commands with root privileges. This vulnerability affects the following Cisco products if they are running a release of the Cisco SD-WAN Solution prior to Release 18.3.0: vEdge 100 Series Routers, vEdge 1000 Series Routers, vEdge 2000 Series Routers, vEdge 5000 Series Routers. Cisco Bug IDs: CSCvi69906.",
  "id": "GHSA-qx27-h95h-m8mh",
  "modified": "2022-05-13T01:35:22Z",
  "published": "2022-05-13T01:35:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0347"
    },
    {
      "type": "WEB",
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180718-sdwan-ci"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104862"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QX7X-73F2-8Q44

Vulnerability from github – Published: 2026-05-02 12:31 – Updated: 2026-05-02 12:31
VLAI
Details

A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-7609"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-02T10:16:19Z",
    "severity": "LOW"
  },
  "details": "A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor explains: \"That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling\". This vulnerability only affects products that are no longer supported by the maintainer.",
  "id": "GHSA-qx7x-73f2-8q44",
  "modified": "2026-05-02T12:31:22Z",
  "published": "2026-05-02T12:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7609"
    },
    {
      "type": "WEB",
      "url": "https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Trendnet/TEW-821DAP_CI2.md"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/806216"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/360566"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/360566/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-QX8P-M7P2-H44C

Vulnerability from github – Published: 2022-05-24 19:13 – Updated: 2022-05-24 19:13
VLAI
Details

A remote arbitrary command execution vulnerability was discovered in Aruba SD-WAN Software and Gateways; Aruba Operating System Software version(s): Prior to 8.6.0.4-2.2.0.4; Prior to 8.7.1.4, 8.6.0.9, 8.5.0.13, 8.3.0.16, 6.5.4.20, 6.4.4.25. Aruba has released patches for Aruba SD-WAN Software and Gateways and ArubaOS that address this security vulnerability.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-37721"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-09-07T13:15:00Z",
    "severity": "HIGH"
  },
  "details": "A remote arbitrary command execution vulnerability was discovered in Aruba SD-WAN Software and Gateways; Aruba Operating System Software version(s): Prior to 8.6.0.4-2.2.0.4; Prior to 8.7.1.4, 8.6.0.9, 8.5.0.13, 8.3.0.16, 6.5.4.20, 6.4.4.25. Aruba has released patches for Aruba SD-WAN Software and Gateways and ArubaOS that address this security vulnerability.",
  "id": "GHSA-qx8p-m7p2-h44c",
  "modified": "2022-05-24T19:13:13Z",
  "published": "2022-05-24T19:13:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-37721"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-280624.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-016.txt"
    }
  ],
  "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"
    }
  ]
}

GHSA-QX96-W4VC-FJW9

Vulnerability from github – Published: 2025-07-22 21:31 – Updated: 2025-07-22 21:31
VLAI
Details

File Upload vulnerability in agent.hub.controller.refresh_plugins in eosphoros-ai DB-GPT 0.7.0 allows remote attackers to execute arbitrary code via a malicious plugin ZIP file uploaded to the /v1/personal/agent/upload endpoint, interacting with plugin_hub._sanitize_filename and plugins_util.scan_plugins.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-51459"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-22T19:15:25Z",
    "severity": "MODERATE"
  },
  "details": "File Upload vulnerability in agent.hub.controller.refresh_plugins in eosphoros-ai DB-GPT 0.7.0 allows remote attackers to execute arbitrary code via a malicious plugin ZIP file uploaded to the /v1/personal/agent/upload endpoint, interacting with plugin_hub._sanitize_filename and plugins_util.scan_plugins.",
  "id": "GHSA-qx96-w4vc-fjw9",
  "modified": "2025-07-22T21:31:14Z",
  "published": "2025-07-22T21:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-51459"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eosphoros-ai/DB-GPT/pull/2649"
    },
    {
      "type": "WEB",
      "url": "https://www.gecko.security/blog/cve-2025-51459"
    }
  ],
  "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-QXHC-QPV2-7R2R

Vulnerability from github – Published: 2021-12-27 00:01 – Updated: 2022-01-05 00:01
VLAI
Details

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK852 before 3.2.16.6, RBR850 before 3.2.16.6, and RBS850 before 3.2.16.6.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-45585"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-12-26T01:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Certain NETGEAR devices are affected by command injection by an authenticated user. This affects RBK752 before 3.2.16.6, RBR750 before 3.2.16.6, RBS750 before 3.2.16.6, RBK852 before 3.2.16.6, RBR850 before 3.2.16.6, and RBS850 before 3.2.16.6.",
  "id": "GHSA-qxhc-qpv2-7r2r",
  "modified": "2022-01-05T00:01:21Z",
  "published": "2021-12-27T00:01:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45585"
    },
    {
      "type": "WEB",
      "url": "https://kb.netgear.com/000064107/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-WiFi-Systems-PSV-2020-0093"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Mitigation
Architecture and Design

If at all possible, use library calls rather than external processes to recreate the desired functionality.

Mitigation
Implementation

If possible, ensure that all external commands called from the program are statically created.

Mitigation MIT-5
Implementation

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
Operation

Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

Mitigation
System Configuration

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.