Denial of service due to usage of vulnerable Nimbus JOSE+JWT in Pivotal Spring Security



Published: 2020-01-09 | Updated: 2020-02-06
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-17195
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Spring Security
Server applications / Frameworks for developing and running applications

Vendor VMware, Inc

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated: 06.02.2020

Updated list of affected and fixed software versions.

1) Input validation error

EUVDB-ID: #VU24168

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17195

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to Nimbus JOSE+JWT throws various uncaught exceptions while parsing a JWT. A remote attacker can send a specially crafted JWT token and cause the application to crash or potentially bypass authentication.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Spring Security: 5.2.0 - 5.2.1

External links

http://github.com/spring-projects/spring-security/releases/tag/5.3.0.M1
http://github.com/spring-projects/spring-security/issues/7570


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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