CVE-2020-5407: Signature Wrapping Vulnerability in Spring Security
Summary
CVE-2020-5407: Signature wrapping vulnerability in Spring Security. Affects org.springframework.security:spring-security-core across 2 version ranges.
>= 5.2.0, < 5.2.4
>= 5.3.0, < 5.3.2
Fixed in 5.2.4 or 5.3.2, depending on the release line you run. How to fix ↓
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Background
The package under scrutiny is org.springframework.security:spring-security-core, which is a component of Spring Security. Spring Security is a powerful and highly customizable authentication and access control framework for Java applications. It provides comprehensive security services for web applications, including authentication, authorization, and protection against common security threats. This vulnerability affects versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 of the package.
Vulnerability Detail
The vulnerability in Spring Security is a signature wrapping vulnerability that occurs during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an arbitrary assertion that Spring Security will accept as valid. This can lead to unauthorized access, privilege escalation, and potential data breaches.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
>= 5.2.0, < 5.2.45.2.4 -
>= 5.3.0, < 5.3.25.3.2
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by upgrading to the fixed versions of Spring Security.
Conclusion
In conclusion, the signature wrapping vulnerability in Spring Security can lead to unauthorized access, privilege escalation, and potential data breaches. It is crucial to upgrade to the fixed versions of Spring Security (5.2.4 or 5.3.2) and properly validate and sanitize SAML responses to prevent signature wrapping attacks. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Spring Security is a powerful and highly customizable authentication and access control framework for Java applications. It provides comprehensive security services for web applications, including authentication, authorization, and protection against common security threats.
A signature wrapping vulnerability is a type of attack where a malicious user can modify a valid digital signature in a way that the modified signature is still considered valid by the system. In the case of this vulnerability in Spring Security, a malicious user can modify a valid SAML response and append an arbitrary assertion that Spring Security will accept as valid.
This vulnerability can lead to unauthorized access, privilege escalation, and potential data breaches. An attacker could exploit this vulnerability to gain access to sensitive information, perform actions on behalf of other users, or manipulate the system in unintended ways.
No, only versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 of Spring Security are affected by this vulnerability. It is recommended to check the version of Spring Security used in your application and upgrade if necessary.
No, there is no known workaround for this vulnerability. It is crucial to apply the fix by upgrading to the fixed versions of Spring Security.
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