#VU21326 Improper access control in Jira Software - CVE-2019-8442

Vulnerability identifier: #VU21326

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-8442

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

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

Vendor: Atlassian

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the "CachingResourceDownloadRewriteRule" class. A remote attacker can bypass implemented security restrictions and gain unauthorized access to files in the Jira webroot under the META-INF directory via a lax path access check.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jira Software: 3.7.1 - 3.7.4, 7.0 - 7.0.11, 7.1 - 7.13.3, 7.2.0 - 7.2.15, 7.3 - 7.3.9, 7.4.0 - 7.4.6, 7.5.0 - 7.5.4, 7.6.0 - 7.6.16, 7.7.0 - 7.7.5, 7.8.0 - 7.8.5, 7.9.0 - 7.9.3, 8.0.0 - 8.0.3, 8.1.0

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External links
https://jira.atlassian.com/browse/JRASERVER-69241

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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.