CVE-2019-20105 Missing authorization in Application Links

Medium 4.9 Published 17 Mar 2020 Updated 16 Sep 2024

Remote attackers with admin session access bypass WebSudo re-authentication in Atlassian Application Links, allowing unauthorized access to sensitive servlet resources.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-20105?

CVE-2019-20105 is a medium-severity missing authorization vulnerability in Atlassian Application Links, published on 17 Mar 2020. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

The EditApplinkServlet resource in the Atlassian Application Links plugin before version 5.4.20, from version 6.0.0 before version 6.0.12, from version 6.1.0 before version 6.1.2, from version 7.0.0 before version 7.0.1, and from version 7.1.0 before version 7.1.3 allows remote attackers who have obtained access to administrator's session to access the EditApplinkServlet resource without needing to re-authenticate to pass "WebSudo" in products that support "WebSudo" through an improper access control vulnerability.

Weakness: CWE-306

Which versions are affected by CVE-2019-20105?

It affects 1 product.

Products include Atlassian Application Links.

How do I fix CVE-2019-20105?

No fix has been published for CVE-2019-20105 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-20105 being exploited?

There is no known exploitation of CVE-2019-20105 in the wild and no public exploit code.

Sources

Also known as GHSA-hhrj-8h23-4fr8.