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.
4798 vulnerabilities reference this CWE, most recent first.
CVE-2021-39151 (GCVE-0-2021-39151)
Vulnerability from cvelistv5 – Published: 2021-08-23 17:55 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/x-stream/xstream/security/advi… | x_refsource_CONFIRM |
| https://x-stream.github.io/CVE-2021-39151.html | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2021/dsa-5004 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39150 (GCVE-0-2021-39150)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:20 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
A Server-Side Forgery Request vulnerability in XStream via PriorityQueue unmarshaling
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the [Security Framework](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.
Severity
8.5 (High)
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/x-stream/xstream/security/advi… | x_refsource_CONFIRM |
| https://x-stream.github.io/CVE-2021-39150.html | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2021/dsa-5004 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39149 (GCVE-0-2021-39149)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:05 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
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| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
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CVE-2021-39148 (GCVE-0-2021-39148)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:05 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/x-stream/xstream/security/advi… | x_refsource_CONFIRM |
| https://x-stream.github.io/CVE-2021-39148.html | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2021/dsa-5004 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39147 (GCVE-0-2021-39147)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:05 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/x-stream/xstream/security/advi… | x_refsource_CONFIRM |
| https://x-stream.github.io/CVE-2021-39147.html | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2021/dsa-5004 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39146 (GCVE-0-2021-39146)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:05 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
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| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39145 (GCVE-0-2021-39145)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:05 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://github.com/x-stream/xstream/security/advi… | x_refsource_CONFIRM |
| https://x-stream.github.io/CVE-2021-39145.html | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2021/dsa-5004 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39144 (GCVE-0-2021-39144)
Vulnerability from cvelistv5 – Published: 2021-08-23 00:00 – Updated: 2025-10-21 23:25
VLAI
EPSS
VEX
Title
XStream is vulnerable to a Remote Command Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
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CVE-2021-39141 (GCVE-0-2021-39141)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:05 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream is vulnerable to an Arbitrary Code Execution attack
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
8.5 (High)
CWE
Assigner
References
11 references
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| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| 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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| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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CVE-2021-39140 (GCVE-0-2021-39140)
Vulnerability from cvelistv5 – Published: 2021-08-23 18:15 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
XStream can cause a Denial of Service
Summary
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Severity
6.5 (Medium)
CWE
Assigner
References
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|---|---|
| https://github.com/x-stream/xstream/security/advi… | x_refsource_CONFIRM |
| https://x-stream.github.io/CVE-2021-39140.html | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.debian.org/security/2021/dsa-5004 | vendor-advisoryx_refsource_DEBIAN |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2021092… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
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"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20210923-0003/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20210923-0003/"
},
{
"name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"name": "https://www.oracle.com/security-alerts/cpujul2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujul2022.html"
}
]
},
"source": {
"advisory": "GHSA-6wf9-jmg9-vxcc",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2021-39140",
"datePublished": "2021-08-23T18:15:13.000Z",
"dateReserved": "2021-08-16T00:00:00.000Z",
"dateUpdated": "2024-08-04T01:58:18.112Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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.