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.
4837 vulnerabilities reference this CWE, most recent first.
GHSA-25FH-5C58-J8Q5
Vulnerability from github – Published: 2025-11-21 15:31 – Updated: 2026-01-20 15:31Deserialization of Untrusted Data vulnerability in Cozmoslabs WP Webhooks wp-webhooks allows Object Injection.This issue affects WP Webhooks: from n/a through <= 3.3.8.
{
"affected": [],
"aliases": [
"CVE-2025-66073"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-21T13:15:48Z",
"severity": "MODERATE"
},
"details": "Deserialization of Untrusted Data vulnerability in Cozmoslabs WP Webhooks wp-webhooks allows Object Injection.This issue affects WP Webhooks: from n/a through \u003c= 3.3.8.",
"id": "GHSA-25fh-5c58-j8q5",
"modified": "2026-01-20T15:31:56Z",
"published": "2025-11-21T15:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66073"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Plugin/wp-webhooks/vulnerability/wordpress-wp-webhooks-plugin-3-3-8-php-object-injection-vulnerability?_s_id=cve"
},
{
"type": "WEB",
"url": "https://vdp.patchstack.com/database/Wordpress/Plugin/wp-webhooks/vulnerability/wordpress-wp-webhooks-plugin-3-3-8-php-object-injection-vulnerability?_s_id=cve"
}
],
"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-25GW-4PCC-45CF
Vulnerability from github – Published: 2022-05-13 01:14 – Updated: 2024-03-04 23:13In Apache Batik 1.x before 1.10, when deserializing subclass of AbstractDocument, the class takes a string from the inputStream as the class name which then use it to call the no-arg constructor of the class. Fix was to check the class type before calling newInstance in deserialization.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.9.1"
},
"package": {
"ecosystem": "Maven",
"name": "org.apache.xmlgraphics:batik"
},
"ranges": [
{
"events": [
{
"introduced": "1.0"
},
{
"fixed": "1.10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-8013"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-29T18:57:27Z",
"nvd_published_at": "2018-05-24T16:29:00Z",
"severity": "CRITICAL"
},
"details": "In Apache Batik 1.x before 1.10, when deserializing subclass of `AbstractDocument`, the class takes a string from the inputStream as the class name which then use it to call the no-arg constructor of the class. Fix was to check the class type before calling newInstance in deserialization.",
"id": "GHSA-25gw-4pcc-45cf",
"modified": "2024-03-04T23:13:20Z",
"published": "2022-05-13T01:14:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-8013"
},
{
"type": "WEB",
"url": "https://github.com/apache/xmlgraphics-batik/commit/f91125b26a6ca2b7a1195f1842360bed03629839"
},
{
"type": "WEB",
"url": "https://xmlgraphics.apache.org/security.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2020.html"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4215"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3661-1"
},
{
"type": "WEB",
"url": "https://ubuntu.com/security/CVE-2018-8013"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202401-11"
},
{
"type": "WEB",
"url": "https://mail-archives.apache.org/mod_mbox/xmlgraphics-batik-dev/201805.mbox/%3c000701d3f28f%24d01860a0%24704921e0%24%40gmail.com%3e"
},
{
"type": "WEB",
"url": "https://mail-archives.apache.org/mod_mbox/xmlgraphics-batik-dev/201805.mbox/%3c000701d3f28f$d01860a0$704921e0$@gmail.com%3e"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/05/msg00016.html"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rc0a31867796043fbe59113fb654fe8b13309fe04f8935acb8d0fab19@%3Ccommits.xmlgraphics.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/rc0a31867796043fbe59113fb654fe8b13309fe04f8935acb8d0fab19%40%3Ccommits.xmlgraphics.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r9e90b4d1cf6ea87a79bb506541140dfbf4801f4463a7cee08126ee44@%3Ccommits.xmlgraphics.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r9e90b4d1cf6ea87a79bb506541140dfbf4801f4463a7cee08126ee44%40%3Ccommits.xmlgraphics.apache.org%3E"
},
{
"type": "WEB",
"url": "https://issues.apache.org/jira/browse/BATIK-1222"
},
{
"type": "WEB",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
},
{
"type": "WEB",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104252"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1040995"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Deserialization of Untrusted Data in Apache Batik"
}
GHSA-25P3-J54H-933P
Vulnerability from github – Published: 2022-05-14 01:45 – Updated: 2022-05-14 01:45VT-Designer Version 2.1.7.31 is vulnerable by the program populating objects with user supplied input via a file without first checking for validity, allowing attacker supplied input to be written to known memory locations. This may cause the program to crash or allow remote code execution.
{
"affected": [],
"aliases": [
"CVE-2018-18987"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-11-30T18:29:00Z",
"severity": "HIGH"
},
"details": "VT-Designer Version 2.1.7.31 is vulnerable by the program populating objects with user supplied input via a file without first checking for validity, allowing attacker supplied input to be written to known memory locations. This may cause the program to crash or allow remote code execution.",
"id": "GHSA-25p3-j54h-933p",
"modified": "2022-05-14T01:45:04Z",
"published": "2022-05-14T01:45:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18987"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-333-01"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/106071"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-25P3-WX48-C43F
Vulnerability from github – Published: 2025-09-22 21:30 – Updated: 2026-04-01 18:36Deserialization of Untrusted Data vulnerability in awesomesupport Awesome Support allows Object Injection. This issue affects Awesome Support: from n/a through 6.3.4.
{
"affected": [],
"aliases": [
"CVE-2025-58662"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-22T19:16:16Z",
"severity": "HIGH"
},
"details": "Deserialization of Untrusted Data vulnerability in awesomesupport Awesome Support allows Object Injection. This issue affects Awesome Support: from n/a through 6.3.4.",
"id": "GHSA-25p3-wx48-c43f",
"modified": "2026-04-01T18:36:16Z",
"published": "2025-09-22T21:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58662"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/awesome-support/vulnerability/wordpress-awesome-support-plugin-6-3-4-deserialization-of-untrusted-data-vulnerability?_s_id=cve"
}
],
"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-25PC-85QF-6J69
Vulnerability from github – Published: 2019-08-01 19:17 – Updated: 2021-08-17 20:24In Apache Storm versions 1.1.0 to 1.2.2, when the user is using the storm-kafka-client or storm-kafka modules, it is possible to cause the Storm UI daemon to deserialize user provided bytes into a Java class.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.storm:storm-kafka"
},
"ranges": [
{
"events": [
{
"introduced": "1.1.0"
},
{
"fixed": "1.2.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.storm:storm-kafka-client"
},
"ranges": [
{
"events": [
{
"introduced": "1.1.0"
},
{
"fixed": "1.2.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-11779"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2019-08-01T17:52:52Z",
"nvd_published_at": "2019-07-26T00:15:00Z",
"severity": "CRITICAL"
},
"details": "In Apache Storm versions 1.1.0 to 1.2.2, when the user is using the storm-kafka-client or storm-kafka modules, it is possible to cause the Storm UI daemon to deserialize user provided bytes into a Java class.",
"id": "GHSA-25pc-85qf-6j69",
"modified": "2021-08-17T20:24:21Z",
"published": "2019-08-01T19:17:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-11779"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/3e4f704c4bd9296405a07a0290b8cbb6cbf5046e277efe6d93280a98@%3Cuser.storm.apache.org%3E"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Deserialization of Untrusted Data in Apache Storm"
}
GHSA-25RV-HRR2-4WX8
Vulnerability from github – Published: 2025-05-20 18:30 – Updated: 2025-05-20 18:30An authenticated user can modify application state data.
{
"affected": [],
"aliases": [
"CVE-2025-48018"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-20T16:15:35Z",
"severity": "HIGH"
},
"details": "An authenticated user can modify application state data.",
"id": "GHSA-25rv-hrr2-4wx8",
"modified": "2025-05-20T18:30:57Z",
"published": "2025-05-20T18:30:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48018"
},
{
"type": "WEB",
"url": "https://selinc.com/products/software/latest-software-versions"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-25WQ-M5R4-RRM3
Vulnerability from github – Published: 2025-05-23 15:31 – Updated: 2026-04-28 21:35Deserialization of Untrusted Data vulnerability in themeton Dash allows Object Injection. This issue affects Dash: from n/a through 1.3.
{
"affected": [],
"aliases": [
"CVE-2025-31049"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-23T13:15:25Z",
"severity": "CRITICAL"
},
"details": "Deserialization of Untrusted Data vulnerability in themeton Dash allows Object Injection. This issue affects Dash: from n/a through 1.3.",
"id": "GHSA-25wq-m5r4-rrm3",
"modified": "2026-04-28T21:35:38Z",
"published": "2025-05-23T15:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-31049"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/theme/dash/vulnerability/wordpress-dash-1-3-php-object-injection-vulnerability?_s_id=cve"
}
],
"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-262J-QV9G-9XHX
Vulnerability from github – Published: 2022-08-23 00:00 – Updated: 2022-08-24 00:00PHP Object Injection vulnerability in Easy Digital Downloads plugin <= 3.0.1 at WordPress.
{
"affected": [],
"aliases": [
"CVE-2022-33900"
],
"database_specific": {
"cwe_ids": [
"CWE-502",
"CWE-74"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-08-22T15:15:00Z",
"severity": "HIGH"
},
"details": "PHP Object Injection vulnerability in Easy Digital Downloads plugin \u003c= 3.0.1 at WordPress.",
"id": "GHSA-262j-qv9g-9xhx",
"modified": "2022-08-24T00:00:28Z",
"published": "2022-08-23T00:00:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-33900"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/easy-digital-downloads/wordpress-easy-digital-downloads-plugin-3-0-1-php-object-injection-vulnerability"
},
{
"type": "WEB",
"url": "https://wordpress.org/plugins/easy-digital-downloads/#developers"
}
],
"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-264W-XRR7-6QQG
Vulnerability from github – Published: 2022-05-24 17:12 – Updated: 2023-10-26 21:51OpenShift Pipeline Plugin 1.0.56 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types. This results in a remote code execution (RCE) vulnerability exploitable by users able to provide YAML input files to OpenShift Pipeline Plugin’s build step. OpenShift Pipeline Plugin 1.0.57 configures its YAML parser to only instantiate safe types.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.0.56"
},
"package": {
"ecosystem": "Maven",
"name": "com.openshift.jenkins:openshift-pipeline"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.57"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-2167"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-28T23:19:17Z",
"nvd_published_at": "2020-03-25T17:15:00Z",
"severity": "HIGH"
},
"details": "OpenShift Pipeline Plugin 1.0.56 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types. This results in a remote code execution (RCE) vulnerability exploitable by users able to provide YAML input files to OpenShift Pipeline Plugin\u2019s build step. OpenShift Pipeline Plugin 1.0.57 configures its YAML parser to only instantiate safe types.",
"id": "GHSA-264w-xrr7-6qqg",
"modified": "2023-10-26T21:51:37Z",
"published": "2022-05-24T17:12:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-2167"
},
{
"type": "PACKAGE",
"url": "https://github.com/jenkinsci/openshift-pipeline-plugin"
},
{
"type": "WEB",
"url": "https://jenkins.io/security/advisory/2020-03-25/#SECURITY-1739"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2020/03/25/2"
}
],
"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"
}
],
"summary": "RCE vulnerability in Jenkins OpenShift Pipeline Plugin"
}
GHSA-26F8-X7CC-WQPC
Vulnerability from github – Published: 2023-02-07 21:30 – Updated: 2025-07-07 11:59A possible security vulnerability has been identified in Apache Kafka Connect API. This requires access to a Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS config and a SASL-based security protocol, which has been possible on Kafka Connect clusters since Apache Kafka Connect 2.3.0. When configuring the connector via the Kafka Connect REST API, an authenticated operator can set the sasl.jaas.config property for any of the connector's Kafka clients to "com.sun.security.auth.module.JndiLoginModule", which can be done via the producer.override.sasl.jaas.config, consumer.override.sasl.jaas.config, or admin.override.sasl.jaas.config properties. This will allow the server to connect to the attacker's LDAP server and deserialize the LDAP response, which the attacker can use to execute java deserialization gadget chains on the Kafka connect server. Attacker can cause unrestricted deserialization of untrusted data (or) RCE vulnerability when there are gadgets in the classpath. Since Apache Kafka 3.0.0, users are allowed to specify these properties in connector configurations for Kafka Connect clusters running with out-of-the-box configurations. Before Apache Kafka 3.0.0, users may not specify these properties unless the Kafka Connect cluster has been reconfigured with a connector client override policy that permits them. Since Apache Kafka 3.4.0, we have added a system property ("-Dorg.apache.kafka.disallowed.login.modules") to disable the problematic login modules usage in SASL JAAS configuration. Also by default "com.sun.security.auth.module.JndiLoginModule" is disabled in Apache Kafka Connect 3.4.0. We advise the Kafka Connect users to validate connector configurations and only allow trusted JNDI configurations. Also examine connector dependencies for vulnerable versions and either upgrade their connectors, upgrading that specific dependency, or removing the connectors as options for remediation. Finally, in addition to leveraging the "org.apache.kafka.disallowed.login.modules" system property, Kafka Connect users can also implement their own connector client config override policy, which can be used to control which Kafka client properties can be overridden directly in a connector config and which cannot.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.kafka:connect"
},
"ranges": [
{
"events": [
{
"introduced": "2.3.0"
},
{
"fixed": "3.4.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-25194"
],
"database_specific": {
"cwe_ids": [
"CWE-502"
],
"github_reviewed": true,
"github_reviewed_at": "2023-02-08T22:18:02Z",
"nvd_published_at": "2023-02-07T20:15:00Z",
"severity": "HIGH"
},
"details": "A possible security vulnerability has been identified in Apache Kafka Connect API. This requires access to a Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS config and a SASL-based security protocol, which has been possible on Kafka Connect clusters since Apache Kafka Connect 2.3.0. When configuring the connector via the Kafka Connect REST API, an authenticated operator can set the `sasl.jaas.config` property for any of the connector\u0027s Kafka clients to \"com.sun.security.auth.module.JndiLoginModule\", which can be done via the `producer.override.sasl.jaas.config`, `consumer.override.sasl.jaas.config`, or `admin.override.sasl.jaas.config` properties. This will allow the server to connect to the attacker\u0027s LDAP server and deserialize the LDAP response, which the attacker can use to execute java deserialization gadget chains on the Kafka connect server. Attacker can cause unrestricted deserialization of untrusted data (or) RCE vulnerability when there are gadgets in the classpath. Since Apache Kafka 3.0.0, users are allowed to specify these properties in connector configurations for Kafka Connect clusters running with out-of-the-box configurations. Before Apache Kafka 3.0.0, users may not specify these properties unless the Kafka Connect cluster has been reconfigured with a connector client override policy that permits them. Since Apache Kafka 3.4.0, we have added a system property (\"-Dorg.apache.kafka.disallowed.login.modules\") to disable the problematic login modules usage in SASL JAAS configuration. Also by default \"com.sun.security.auth.module.JndiLoginModule\" is disabled in Apache Kafka Connect 3.4.0. We advise the Kafka Connect users to validate connector configurations and only allow trusted JNDI configurations. Also examine connector dependencies for vulnerable versions and either upgrade their connectors, upgrading that specific dependency, or removing the connectors as options for remediation. Finally, in addition to leveraging the \"org.apache.kafka.disallowed.login.modules\" system property, Kafka Connect users can also implement their own connector client config override policy, which can be used to control which Kafka client properties can be overridden directly in a connector config and which cannot.",
"id": "GHSA-26f8-x7cc-wqpc",
"modified": "2025-07-07T11:59:33Z",
"published": "2023-02-07T21:30:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-25194"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/1529790"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/kafka"
},
{
"type": "WEB",
"url": "https://kafka.apache.org/cve-list"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread/vy1c7fqcdqvq5grcqp6q5jyyb302khyz"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/173151/Apache-Druid-JNDI-Injection-Remote-Code-Execution.html"
}
],
"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"
}
],
"summary": "Apache Kafka Connect vulnerable to Deserialization of Untrusted Data"
}
Mitigation
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
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
Explicitly define a final object() to prevent deserialization.
Mitigation
- 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
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
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
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.