Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
5669 vulnerabilities reference this CWE, most recent first.
CVE-2021-21956 (GCVE-0-2021-21956)
Vulnerability from cvelistv5 – Published: 2022-04-14 19:56 – Updated: 2025-04-15 19:08
VLAI
EPSS
VEX
Summary
A php unserialize vulnerability exists in the Ai-Bolit functionality of CloudLinux Inc Imunify360 5.10.2. A specially-crafted malformed file can lead to potential arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-15 18:23 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CloudLinux Inc | Imunify360 |
Affected:
5.8
Affected: 5.9 |
Date Public
2021-11-22 00:00
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CVE-2021-21869 (GCVE-0-2021-21869)
Vulnerability from cvelistv5 – Published: 2021-08-25 18:16 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
An unsafe deserialization vulnerability exists in the Engine.plugin ProfileInformation ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_MISC |
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
Impacted products
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CVE-2021-21868 (GCVE-0-2021-21868)
Vulnerability from cvelistv5 – Published: 2021-08-18 14:35 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
An unsafe deserialization vulnerability exists in the ObjectManager.plugin Project.get_MissingTypes() functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_MISC |
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
Impacted products
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CVE-2021-21867 (GCVE-0-2021-21867)
Vulnerability from cvelistv5 – Published: 2021-08-18 14:34 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
An unsafe deserialization vulnerability exists in the ObjectManager.plugin ObjectStream.ProfileByteArray functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_MISC |
Impacted products
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CVE-2021-21866 (GCVE-0-2021-21866)
Vulnerability from cvelistv5 – Published: 2021-08-02 20:33 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
A unsafe deserialization vulnerability exists in the ObjectManager.plugin ProfileInformation.ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_CONFIRM |
Impacted products
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CVE-2021-21865 (GCVE-0-2021-21865)
Vulnerability from cvelistv5 – Published: 2021-08-02 20:33 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
A unsafe deserialization vulnerability exists in the PackageManagement.plugin ExtensionMethods.Clone() functionality of CODESYS GmbH CODESYS Development System 3.5.16. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_CONFIRM |
Impacted products
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CVE-2021-21864 (GCVE-0-2021-21864)
Vulnerability from cvelistv5 – Published: 2021-08-02 20:33 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
A unsafe deserialization vulnerability exists in the ComponentModel ComponentManager.StartupCultureSettings functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
7.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://talosintelligence.com/vulnerability_repor… | x_refsource_MISC |
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_CONFIRM |
Impacted products
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CVE-2021-21863 (GCVE-0-2021-21863)
Vulnerability from cvelistv5 – Published: 2021-08-05 20:00 – Updated: 2024-08-03 18:23
VLAI
EPSS
VEX
Summary
A unsafe deserialization vulnerability exists in the ComponentModel Profile.FromFile() functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Severity
8.8 (High)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://customers.codesys.com/index.php?eID=dumpF… | x_refsource_MISC |
Impacted products
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CVE-2021-21524 (GCVE-0-2021-21524)
Vulnerability from cvelistv5 – Published: 2021-04-12 19:50 – Updated: 2024-09-16 16:52
VLAI
EPSS
VEX
Summary
Dell SRM versions prior to 4.5.0.1 and Dell SMR versions prior to 4.5.0.1 contain an Untrusted Deserialization Vulnerability. A remote unauthenticated attacker may potentially exploit this vulnerability, leading to arbitrary privileged code execution on the vulnerable application. The severity is Critical as this may lead to system compromise by unauthenticated attackers.
Severity
9.8 (Critical)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00018475… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Dell EMC Storage Monitoring and Reporting |
Affected:
unspecified , < 4.5.0.1
(custom)
|
Date Public
2021-03-30 00:00
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CVE-2021-21426 (GCVE-0-2021-21426)
Vulnerability from cvelistv5 – Published: 2021-04-21 20:15 – Updated: 2024-08-03 18:09
VLAI
EPSS
VEX
Title
Fixes a bug in Zend Framework's Stream HTTP Wrapper
Summary
Magento-lts is a long-term support alternative to Magento Community Edition (CE). In magento-lts versions 19.4.12 and prior and 20.0.8 and prior, there is a vulnerability caused by the unsecured deserialization of an object. A patch in versions 19.4.13 and 20.0.9 was back ported from Zend Framework 3. The vulnerability was assigned CVE-2021-3007 in Zend Framework.
Severity
9.8 (Critical)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/OpenMage/magento-lts/security/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OpenMage | magento-lts |
Affected:
<= 19.4.12
Affected: <= 20.0.8 |
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Mitigation
Architecture and Design
Implementation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Mitigation
Implementation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Mitigation
Implementation
Explicitly define a final object() to prevent deserialization.
Mitigation
Architecture and Design
Implementation
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation
Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
Mitigation
Architecture and Design
Implementation
Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
Mitigation MIT-29
Operation
Strategy: Firewall
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].
CAPEC-586: Object Injection
An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.