Vulnerability identifier: #VU86824

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14338

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
xerces
Other software / Other software solutions

Vendor: Red Hat Inc.

Description

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

The vulnerability exists in Wildfly's implementation of Xerces, specifically in the way the XMLSchemaValidator class in the JAXP component of Wildfly enforced the "use-grammar-pool-only" feature. A remote attacker can pass specially-crafted XML file to the application and manipulate the validation process in certain cases.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

xerces: 2.9.1-1 - 2.12.0.SP02

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1860054
http://lists.apache.org/thread.html/rf96c5afb26b596b4b97883aa90b6c0b0fc4c26aaeea7123c21912103@%3Cj-users.xerces.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.