CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2020-12513 (GCVE-0-2020-12513)
Vulnerability from cvelistv5 – Published: 2021-01-22 19:01 – Updated: 2024-09-16 17:13
VLAI
Title
Pepper+Fuchs Comtrol IO-Link Master OS Command Injection
Summary
Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated blind OS Command Injection.
Severity
7.5 (High)
CWE
- CWE-78 - OS Command Injection
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.vde.com/en-us/advisories/vde-2020-038 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Pepper+Fuchs | Comtrol IO-Link Master |
Affected:
unspecified , ≤ 1.5.48
(custom)
|
Date Public
2021-01-04 00:00
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CVE-2020-12522 (GCVE-0-2020-12522)
Vulnerability from cvelistv5 – Published: 2020-12-17 22:40 – Updated: 2024-09-16 18:14
VLAI
Title
Command Injection Vulnerability in I/O-Check Service of WAGO PFC100, PFC200 and Touch Panel 600 Series with firmware versions <=FW10
Summary
The reported vulnerability allows an attacker who has network access to the device to execute code with specially crafted packets in WAGO Series PFC 100 (750-81xx/xxx-xxx), Series PFC 200 (750-82xx/xxx-xxx), Series Wago Touch Panel 600 Standard Line (762-4xxx), Series Wago Touch Panel 600 Advanced Line (762-5xxx), Series Wago Touch Panel 600 Marine Line (762-6xxx) with firmware versions <=FW10.
Severity
10 (Critical)
CWE
- CWE-78 - OS Command Injection
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.vde.com/en-us/advisories/vde-2020-045 | x_refsource_CONFIRM |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| WAGO | Series PFC 100 (750-81xx/xxx-xxx) |
Affected:
FW1 , ≤ FW10
(custom)
|
|
| WAGO | Series PFC 200 (750-82xx/xxx-xxx) |
Affected:
FW1 , ≤ FW10
(custom)
|
|
| WAGO | Series Wago Touch Panel 600 Standard Line (762-4xxx) |
Affected:
FW1 , ≤ FW10
(custom)
|
|
| WAGO | Series Wago Touch Panel 600 Advanced Line (762-5xxx) |
Affected:
FW1 , ≤ FW10
(custom)
|
|
| WAGO | Series Wago Touch Panel 600 Marine Line (762-6xxx) |
Affected:
FW1 , ≤ FW10
(custom)
|
Date Public
2020-12-17 00:00
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CVE-2020-12774 (GCVE-0-2020-12774)
Vulnerability from cvelistv5 – Published: 2020-07-22 07:20 – Updated: 2024-09-16 17:33
VLAI
Title
D-Link DSL-7740C - Command Injection
Summary
D-Link DSL-7740C does not properly validate user input, which allows an authenticated LAN user to inject arbitrary command.
Severity
8.2 (High)
CWE
- CWE-78 - OS Command Injection
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-3802-27204-1.html | x_refsource_MISC |
Impacted products
Date Public
2020-07-22 00:00
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CVE-2020-12775 (GCVE-0-2020-12775)
Vulnerability from cvelistv5 – Published: 2022-03-01 01:55 – Updated: 2024-09-16 22:35
VLAI
Title
Hicos citizen certificate client-side component - Command Injection
Summary
Hicos citizen certificate client-side component does not filter special characters for command parameters in specific web URLs. An unauthenticated remote attacker can exploit this vulnerability to perform command injection attack to execute arbitrary system command, disrupt system or terminate service.
Severity
9.8 (Critical)
CWE
- CWE-78 - OS Command Injection
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-5695-421a7-1.html | x_refsource_MISC |
| https://moica.nat.gov.tw/rac_plugin.html | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Hicos | citizen certificate client-side component |
Affected:
unspecified , ≤ 3.0.0
(custom)
|
|
| Hicos | citizen certificate client-side component |
Affected:
unspecified , ≤ 1.3.4.12
(custom)
|
Date Public
2022-01-31 00:00
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CVE-2020-13712 (GCVE-0-2020-13712)
Vulnerability from cvelistv5 – Published: 2024-12-20 21:37 – Updated: 2024-12-26 19:29
VLAI
Title
MGOS Command Injection
Summary
A command injection is possible through the user interface, allowing arbitrary command execution as
the root user. oMG2000 running MGOS 3.15.1 or earlier is affected.
MG90 running MGOS 4.2.1 or earlier is affected.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Sierra Wireless | MGOS |
Affected:
all versions before 3.15.1
(Custom)
|
|
| Sierra Wireless | MGOS |
Affected:
all versions before 4.2.1
(Custom)
|
Date Public
2020-11-19 21:36
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CVE-2020-15121 (GCVE-0-2020-15121)
Vulnerability from cvelistv5 – Published: 2020-07-20 18:00 – Updated: 2024-08-04 13:08
VLAI
Title
Command injection in Radare2
Summary
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Severity
7.4 (High)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/radareorg/radare2/security/adv… | x_refsource_CONFIRM |
| https://github.com/radareorg/radare2/issues/16945 | x_refsource_MISC |
| https://github.com/radareorg/radare2/pull/16966 | x_refsource_MISC |
| https://github.com/radareorg/radare2/commit/04edf… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
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CVE-2020-15123 (GCVE-0-2020-15123)
Vulnerability from cvelistv5 – Published: 2020-07-20 17:20 – Updated: 2024-08-04 13:08
VLAI
Title
Command injection in codecov (npm package)
Summary
In codecov (npm package) before version 3.7.1 the upload method has a command injection vulnerability. Clients of the codecov-node library are unlikely to be aware of this, so they might unwittingly write code that contains a vulnerability. A similar CVE (CVE-2020-7597 for GHSA-5q88-cjfq-g2mh) was issued but the fix was incomplete. It only blocked &, and command injection is still possible using backticks instead to bypass the sanitizer. The attack surface is low in this case. Particularly in the standard use of codecov, where the module is used directly in a build pipeline, not built against as a library in another application that may supply malicious input and perform command injection.
Severity
9.3 (Critical)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/codecov/codecov-node/security/… | x_refsource_CONFIRM |
| https://github.com/codecov/codecov-node/pull/180 | x_refsource_MISC |
| https://github.com/codecov/codecov-node/commit/c0… | x_refsource_MISC |
| https://github.com/advisories/GHSA-5q88-cjfq-g2mh | x_refsource_MISC |
| https://lgtm.com/query/7714424068617023832 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| codecov | codecov-node |
Affected:
< 3.7.1
|
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CVE-2020-15271 (GCVE-0-2020-15271)
Vulnerability from cvelistv5 – Published: 2020-10-26 18:10 – Updated: 2024-08-04 13:15
VLAI
Title
Shell Command Execution in lookatme
Summary
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Severity
9.3 (Critical)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/d0c-s4vage/lookatme/security/a… | x_refsource_CONFIRM |
| https://github.com/d0c-s4vage/lookatme/pull/110 | x_refsource_MISC |
| https://github.com/d0c-s4vage/lookatme/commit/72f… | x_refsource_MISC |
| https://github.com/d0c-s4vage/lookatme/releases/t… | x_refsource_MISC |
| https://pypi.org/project/lookatme/#history | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| d0c-s4vage | lookatme |
Affected:
< 2.3.0
|
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CVE-2020-15272 (GCVE-0-2020-15272)
Vulnerability from cvelistv5 – Published: 2020-10-26 18:20 – Updated: 2024-08-04 13:15
VLAI
Title
Shell-injection in git-tag-annotation GitHub action
Summary
In the git-tag-annotation-action (open source GitHub Action) before version 1.0.1, an attacker can execute arbitrary (*) shell commands if they can control the value of [the `tag` input] or manage to alter the value of [the `GITHUB_REF` environment variable]. The problem has been patched in version 1.0.1. If you don't use the `tag` input you are most likely safe. The `GITHUB_REF` environment variable is protected by the GitHub Actions environment so attacks from there should be impossible. If you must use the `tag` input and cannot upgrade to `> 1.0.0` make sure that the value is not controlled by another Action.
Severity
8.7 (High)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ericcornelissen/git-tag-annota… | x_refsource_CONFIRM |
| https://github.com/ericcornelissen/git-tag-annota… | x_refsource_MISC |
| https://github.com/ericcornelissen/git-tag-annota… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ericcornelissen | git-tag-annotation-action |
Affected:
< 1.0.1
|
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CVE-2020-15420 (GCVE-0-2020-15420)
Vulnerability from cvelistv5 – Published: 2020-07-28 17:01 – Updated: 2024-08-04 13:15
VLAI
Summary
This vulnerability allows remote attackers to execute arbitrary code on affected installations of CentOS Web Panel cwp-el7-0.9.8.891. Authentication is not required to exploit this vulnerability. The specific flaw exists within loader_ajax.php. When parsing the line parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-9259.
Severity
9.8 (Critical)
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CentOS Web Panel | CentOS Web Panel |
Affected:
cwp-el7-0.9.8.891
|
Credits
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Mitigation
Phase: Architecture and Design
Description:
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
Mitigation ID: MIT-22
Phases: Architecture and Design, Operation
Strategy: Sandbox or Jail
Description:
- Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
- OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
- This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
- Be careful to avoid CWE-243 and other weaknesses related to jails.
Mitigation
Phase: Architecture and Design
Strategy: Attack Surface Reduction
Description:
- For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
Mitigation ID: MIT-15
Phase: Architecture and Design
Description:
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation ID: MIT-4.3
Phase: Architecture and Design
Strategy: Libraries or Frameworks
Description:
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, consider using the ESAPI Encoding control [REF-45] or a similar tool, library, or framework. These will help the programmer encode outputs in a manner less prone to error.
Mitigation ID: MIT-28
Phase: Implementation
Strategy: Output Encoding
Description:
- While it is risky to use dynamically-generated query strings, code, or commands that mix control and data together, sometimes it may be unavoidable. Properly quote arguments and escape any special characters within those arguments. The most conservative approach is to escape or filter all characters that do not pass an extremely strict allowlist (such as everything that is not alphanumeric or white space). If some special characters are still needed, such as white space, wrap each argument in quotes after the escaping/filtering step. Be careful of argument injection (CWE-88).
Mitigation
Phase: Implementation
Description:
- If the program to be executed allows arguments to be specified within an input file or from standard input, then consider using that mode to pass arguments instead of the command line.
Mitigation ID: MIT-27
Phase: Architecture and Design
Strategy: Parameterization
Description:
- If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.
- Some languages offer multiple functions that can be used to invoke commands. Where possible, identify any function that invokes a command shell using a single string, and replace it with a function that requires individual arguments. These functions typically perform appropriate quoting and filtering of arguments. For example, in C, the system() function accepts a string that contains the entire command to be executed, whereas execl(), execve(), and others require an array of strings, one for each argument. In Windows, CreateProcess() only accepts one command at a time. In Perl, if system() is provided with an array of arguments, then it will quote each of the arguments.
Mitigation ID: MIT-5
Phase: Implementation
Strategy: Input Validation
Description:
- 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.
- When constructing OS command strings, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. This will indirectly limit the scope of an attack, but this technique is less important than proper output encoding and escaping.
- Note that proper output encoding, escaping, and quoting is the most effective solution for preventing OS command injection, although input validation may provide some defense-in-depth. This is because it effectively limits what will appear in output. Input validation will not always prevent OS command injection, especially if you are required to support free-form text fields that could contain arbitrary characters. For example, when invoking a mail program, you might need to allow the subject field to contain otherwise-dangerous inputs like ";" and ">" characters, which would need to be escaped or otherwise handled. In this case, stripping the character might reduce the risk of OS command injection, but it would produce incorrect behavior because the subject field would not be recorded as the user intended. This might seem to be a minor inconvenience, but it could be more important when the program relies on well-structured subject lines in order to pass messages to other components.
- Even if you make a mistake in your validation (such as forgetting one out of 100 input fields), appropriate encoding is still likely to protect you from injection-based attacks. As long as it is not done in isolation, input validation is still a useful technique, since it may significantly reduce your attack surface, allow you to detect some attacks, and provide other security benefits that proper encoding does not address.
Mitigation ID: MIT-21
Phase: Architecture and Design
Strategy: Enforcement by Conversion
Description:
- When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Mitigation ID: MIT-32
Phase: Operation
Strategy: Compilation or Build Hardening
Description:
- Run the code in an environment that performs automatic taint propagation and prevents any command execution that uses tainted variables, such as Perl's "-T" switch. This will force the program to perform validation steps that remove the taint, although you must be careful to correctly validate your inputs so that you do not accidentally mark dangerous inputs as untainted (see CWE-183 and CWE-184).
Mitigation ID: MIT-32
Phase: Operation
Strategy: Environment Hardening
Description:
- Run the code in an environment that performs automatic taint propagation and prevents any command execution that uses tainted variables, such as Perl's "-T" switch. This will force the program to perform validation steps that remove the taint, although you must be careful to correctly validate your inputs so that you do not accidentally mark dangerous inputs as untainted (see CWE-183 and CWE-184).
Mitigation ID: MIT-39
Phase: Implementation
Description:
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
- In the context of OS Command Injection, error information passed back to the user might reveal whether an OS command is being executed and possibly which command is being used.
Mitigation
Phase: Operation
Strategy: Sandbox or Jail
Description:
- Use runtime policy enforcement to create an allowlist of allowable commands, then prevent use of any command that does not appear in the allowlist. Technologies such as AppArmor are available to do this.
Mitigation ID: MIT-29
Phase: Operation
Strategy: Firewall
Description:
- Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
Mitigation ID: MIT-17
Phases: Architecture and Design, Operation
Strategy: Environment Hardening
Description:
- Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
Mitigation ID: MIT-16
Phases: Operation, Implementation
Strategy: Environment Hardening
Description:
- When using PHP, configure the application so that it does not use register_globals. During implementation, develop the application so that it does not rely on this feature, but be wary of implementing a register_globals emulation that is subject to weaknesses such as CWE-95, CWE-621, and similar issues.
CAPEC-108: Command Line Execution through SQL Injection
An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
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-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-6: Argument Injection
An attacker changes the behavior or state of a targeted application through injecting data or command syntax through the targets use of non-validated and non-filtered arguments of exposed services or methods.
CAPEC-88: OS Command Injection
In this type of an attack, an adversary injects operating system commands into existing application functions. An application that uses untrusted input to build command strings is vulnerable. An adversary can leverage OS command injection in an application to elevate privileges, execute arbitrary commands and compromise the underlying operating system.