#VU24168 Input validation error in Nimbus JOSE+JWT - CVE-2019-17195

Vulnerability identifier: #VU24168

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-17195

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nimbus JOSE+JWT
Universal components / Libraries / Libraries used by multiple products

Vendor: Connect2id Ltd.

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 updates from vendor's website.

Vulnerable software versions

Nimbus JOSE+JWT: 7.0 - 7.8.1

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External links
https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/SECURITY-CHANGELOG.txt
https://connect2id.com/blog/nimbus-jose-jwt-7-9
https://lists.apache.org/thread.html/8768553cda5838f59ee3865cac546e824fa740e82d9dc2a7fc44e80d@%3Ccommon-dev.hadoop.apache.org%3E
https://lists.apache.org/thread.html/e10d43984f39327e443e875adcd4a5049193a7c010e81971908caf41@%3Ccommon-issues.hadoop.apache.org%3E

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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.