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.

5405 vulnerabilities reference this CWE, most recent first.

GHSA-5FX6-GR9Q-R6CW

Vulnerability from github – Published: 2022-05-24 16:48 – Updated: 2024-04-04 00:59
VLAI
Details

A command injection can occur for specially crafted PDF files in Foxit Reader SDK (ActiveX) Professional 5.4.0.1031 when the JavaScript API app.launchURL is used. An attacker can leverage this to gain remote code execution.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-19445"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-06-17T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "A command injection can occur for specially crafted PDF files in Foxit Reader SDK (ActiveX) Professional 5.4.0.1031 when the JavaScript API app.launchURL is used. An attacker can leverage this to gain remote code execution.",
  "id": "GHSA-5fx6-gr9q-r6cw",
  "modified": "2024-04-04T00:59:03Z",
  "published": "2022-05-24T16:48:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-19445"
    },
    {
      "type": "WEB",
      "url": "https://www.foxitsoftware.com/support/security-bulletins.php"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-5G5Q-2W78-P2MW

Vulnerability from github – Published: 2022-05-14 01:14 – Updated: 2022-05-14 01:14
VLAI
Details

An issue was discovered in CMS Made Simple 2.2.8. It is possible, with an administrator account, to achieve command injection by modifying the path of the e-mail executable in Mail Settings, setting "sendmail" in the "Mailer" option, and launching the "Forgot your password" feature.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2019-9059"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-03-26T17:29:00Z",
    "severity": "HIGH"
  },
  "details": "An issue was discovered in CMS Made Simple 2.2.8. It is possible, with an administrator account, to achieve command injection by modifying the path of the e-mail executable in Mail Settings, setting \"sendmail\" in the \"Mailer\" option, and launching the \"Forgot your password\" feature.",
  "id": "GHSA-5g5q-2w78-p2mw",
  "modified": "2022-05-14T01:14:57Z",
  "published": "2022-05-14T01:14:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9059"
    },
    {
      "type": "WEB",
      "url": "https://newsletter.cmsmadesimple.org/w/89247Qog4jCRCuRinvhsofwg"
    },
    {
      "type": "WEB",
      "url": "https://www.cmsmadesimple.org/2019/03/Announcing-CMS-Made-Simple-v2.2.10-Spuzzum"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-5G8Q-6F25-M4G2

Vulnerability from github – Published: 2024-02-02 18:30 – Updated: 2024-02-02 18:30
VLAI
Details

An OS command injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute commands via a network.

We have already fixed the vulnerability in the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later QuTScloud c5.1.5.2651 and later

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-41283"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-02T16:15:49Z",
    "severity": "MODERATE"
  },
  "details": "An OS command injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute commands via a network.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.1.4.2596 build 20231128 and later\nQuTS hero h5.1.4.2596 build 20231128 and later\nQuTScloud c5.1.5.2651 and later\n",
  "id": "GHSA-5g8q-6f25-m4g2",
  "modified": "2024-02-02T18:30:31Z",
  "published": "2024-02-02T18:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-41283"
    },
    {
      "type": "WEB",
      "url": "https://www.qnap.com/en/security-advisory/qsa-23-53"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-5GGR-XPWV-2FQ3

Vulnerability from github – Published: 2025-05-05 18:32 – Updated: 2025-05-05 18:32
VLAI
Details

An issue in the /usr/local/bin/jncs.sh script of Gefen WebFWC (In AV over IP products) v1.85h, v1.86v, and v1.70 allows attackers with network access to connect to the device over TCP port 4444 without authentication and execute arbitrary commands with root privileges.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-25504"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-05T16:15:50Z",
    "severity": "MODERATE"
  },
  "details": "An issue in the /usr/local/bin/jncs.sh script of Gefen WebFWC (In AV over IP products) v1.85h, v1.86v, and v1.70 allows attackers with network access to connect to the device over TCP port 4444 without authentication and execute arbitrary commands with root privileges.",
  "id": "GHSA-5ggr-xpwv-2fq3",
  "modified": "2025-05-05T18:32:52Z",
  "published": "2025-05-05T18:32:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-25504"
    },
    {
      "type": "WEB",
      "url": "https://www.troy-wilson.com/cve-2025-25504.html"
    },
    {
      "type": "WEB",
      "url": "http://gefen.com"
    }
  ],
  "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-5GGV-478M-C2XW

Vulnerability from github – Published: 2025-02-25 12:32 – Updated: 2025-02-25 12:32
VLAI
Details

A vulnerability classified as critical was found in hzmanyun Education and Training System 3.1.1. Affected by this vulnerability is the function pdf2swf of the file /pdf2swf. The manipulation of the argument file leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-1676"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77",
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-25T11:15:09Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability classified as critical was found in hzmanyun Education and Training System 3.1.1. Affected by this vulnerability is the function pdf2swf of the file /pdf2swf. The manipulation of the argument file leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.",
  "id": "GHSA-5ggv-478m-c2xw",
  "modified": "2025-02-25T12:32:18Z",
  "published": "2025-02-25T12:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1676"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Rain1er/report/blob/main/nxb/rce1.md"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.296731"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.296731"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.500507"
    }
  ],
  "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-5GJW-XF38-367F

Vulnerability from github – Published: 2024-08-03 15:30 – Updated: 2024-08-03 15:30
VLAI
Details

A vulnerability, which was classified as critical, has been found in D-Link DI-8100 16.07. This issue affects the function msp_info_htm of the file msp_info.htm. The manipulation of the argument cmd leads to command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-273521 was assigned to this vulnerability.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-7436"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-03T14:15:48Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability, which was classified as critical, has been found in D-Link DI-8100 16.07. This issue affects the function msp_info_htm of the file msp_info.htm. The manipulation of the argument cmd leads to command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-273521 was assigned to this vulnerability.",
  "id": "GHSA-5gjw-xf38-367f",
  "modified": "2024-08-03T15:30:34Z",
  "published": "2024-08-03T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7436"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aLtEr6/pdf/blob/main/2.pdf"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.273521"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.273521"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.370591"
    }
  ],
  "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-5GM8-48XH-MXJM

Vulnerability from github – Published: 2022-08-11 00:00 – Updated: 2022-08-16 00:00
VLAI
Details

WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 nas.cgi has no filtering on parameters: User1Passwd and User1, which leads to command injection in page /nas_disk.shtml.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-35518"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-08-10T20:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 nas.cgi has no filtering on parameters: User1Passwd and User1, which leads to command injection in page /nas_disk.shtml.",
  "id": "GHSA-5gm8-48xh-mxjm",
  "modified": "2022-08-16T00:00:27Z",
  "published": "2022-08-11T00:00:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-35518"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TyeYeah/othercveinfo/blob/main/wavlink/README.md#wavlink-router-ac1200-page-nas_diskshtml-command-injection-in-nascgi"
    }
  ],
  "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-5GMR-QPRR-XG68

Vulnerability from github – Published: 2025-01-10 18:31 – Updated: 2025-01-13 21:30
VLAI
Details

Linksys E7350 1.1.00.032 was discovered to contain a command injection vulnerability via the ifname parameter in the apcli_do_enr_pin_wps function.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-57224"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-10T18:15:25Z",
    "severity": "CRITICAL"
  },
  "details": "Linksys E7350 1.1.00.032 was discovered to contain a command injection vulnerability via the ifname parameter in the apcli_do_enr_pin_wps function.",
  "id": "GHSA-5gmr-qprr-xg68",
  "modified": "2025-01-13T21:30:52Z",
  "published": "2025-01-10T18:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57224"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yanggao017/vuln/blob/main/Linksys/E7350/CI_3_apcli_do_enr_pin_wps/README.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-5GP4-X3WH-CXGJ

Vulnerability from github – Published: 2022-05-17 00:26 – Updated: 2025-04-12 12:41
VLAI
Details

The fetch_url function in usr.bin/ftp/fetch.c in tnftp, as used in NetBSD 5.1 through 5.1.4, 5.2 through 5.2.2, 6.0 through 6.0.6, and 6.1 through 6.1.5 allows remote attackers to execute arbitrary commands via a | (pipe) character at the end of an HTTP redirect.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2014-8517"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2014-11-17T16:59:00Z",
    "severity": "HIGH"
  },
  "details": "The fetch_url function in usr.bin/ftp/fetch.c in tnftp, as used in NetBSD 5.1 through 5.1.4, 5.2 through 5.2.2, 6.0 through 6.0.6, and 6.1 through 6.1.5 allows remote attackers to execute arbitrary commands via a | (pipe) character at the end of an HTTP redirect.",
  "id": "GHSA-5gp4-x3wh-cxgj",
  "modified": "2025-04-12T12:41:59Z",
  "published": "2022-05-17T00:26:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-8517"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201611-05"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/43112"
    },
    {
      "type": "WEB",
      "url": "http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-013.txt.asc"
    },
    {
      "type": "WEB",
      "url": "http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-updates/2014-11/msg00029.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/oss-sec/2014/q4/459"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/oss-sec/2014/q4/464"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/62028"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/62260"
    },
    {
      "type": "WEB",
      "url": "http://support.apple.com/HT204244"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-5GPF-8PRR-WHQ8

Vulnerability from github – Published: 2026-02-06 21:30 – Updated: 2026-02-06 21:30
VLAI
Details

A security flaw has been discovered in D-Link DIR-823X 250416. This vulnerability affects unknown code of the file /goform/set_ac_server of the component Web Management Interface. The manipulation of the argument ac_server results in os command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-2063"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77",
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-06T19:16:10Z",
    "severity": "MODERATE"
  },
  "details": "A security flaw has been discovered in D-Link DIR-823X 250416. This vulnerability affects unknown code of the file /goform/set_ac_server of the component Web Management Interface. The manipulation of the argument ac_server results in os command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.",
  "id": "GHSA-5gpf-8prr-whq8",
  "modified": "2026-02-06T21:30:49Z",
  "published": "2026-02-06T21:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2063"
    },
    {
      "type": "WEB",
      "url": "https://github.com/master-abc/cve/issues/19"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.344623"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.344623"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.744720"
    },
    {
      "type": "WEB",
      "url": "https://www.dlink.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/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: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"
    }
  ]
}

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.