#VU34175 Input validation error in Jira Software - CVE-2019-20418

Vulnerability identifier: #VU34175

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-20418

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jira Software
Client/Desktop applications / Other client software

Vendor: Atlassian

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can prevent users from accessing the instance via an Application Denial of Service vulnerability in the /rendering/wiki endpoint.

Mitigation
Update to version 8.8.0.

Vulnerable software versions

Jira Software: 8.0.0-m0025 - 8.0.4, 8.1.0 - 8.1.3, 8.2.0 - 8.2.6, 8.3.0 - 8.3.5, 8.4.0 - 8.4.3, 8.5.0 - 8.5.5, 8.6.0 - 8.6.1, 8.7.0 - 8.7.1

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External links
https://jira.atlassian.com/browse/JRASERVER-70943

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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