#VU59661 Observable discrepancy in Wildfly Elytron - CVE-2021-3642

Vulnerability identifier: #VU59661

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3642

CWE-ID: CWE-203

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wildfly Elytron
Server applications / Application servers

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to possibility of a timing attack against the ScramServer. A remote attacker can gain access to potentially sensitive information. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Wildfly Elytron: 1.10.0 - 1.16.0

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1981407

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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.