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Vulnerability Details : CVE-2017-4995

An issue was discovered in Pivotal Spring Security 4.2.0.RELEASE through 4.2.2.RELEASE, and Spring Security 5.0.0.M1. When configured to enable default typing, Jackson contained a deserialization vulnerability that could lead to arbitrary code execution. Jackson fixed this vulnerability by blacklisting known "deserialization gadgets." Spring Security configures Jackson with global default typing enabled, which means that (through the previous exploit) arbitrary code could be executed if all of the following is true: (1) Spring Security's Jackson support is being leveraged by invoking SecurityJackson2Modules.getModules(ClassLoader) or SecurityJackson2Modules.enableDefaultTyping(ObjectMapper); (2) Jackson is used to deserialize data that is not trusted (Spring Security does not perform deserialization using Jackson, so this is an explicit choice of the user); and (3) there is an unknown (Jackson is not blacklisting it already) "deserialization gadget" that allows code execution present on the classpath. Jackson provides a blacklisting approach to protecting against this type of attack, but Spring Security should be proactive against blocking unknown "deserialization gadgets" when Spring Security enables default typing.
Publish Date : 2017-11-27 Last Update Date : 2017-12-20
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 502

- Products Affected By CVE-2017-4995

# Product Type Vendor Product Version Update Edition Language
1 Application Pivotal Software Spring Security 4.2.0 Release Version Details Vulnerabilities
2 Application Pivotal Software Spring Security 4.2.1 Release Version Details Vulnerabilities
3 Application Pivotal Software Spring Security 4.2.2 Release Version Details Vulnerabilities
4 Application Pivotal Software Spring Security 5.0.0 M1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Pivotal Software Spring Security 4

- References For CVE-2017-4995

http://www.securityfocus.com/bid/99080
BID 99080 Pivotal Spring Security Deserialization CVE-2017-4995 Remote Code Execution Vulnerability Release Date:2017-06-15
https://pivotal.io/security/cve-2017-4995 CONFIRM

- Metasploit Modules Related To CVE-2017-4995

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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