CVE-2020-36240 Path traversal in Crowd

What is CVE-2020-36240?

CVE-2020-36240 is a medium-severity path traversal vulnerability in Atlassian Crowd, published on 1 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The ResourceDownloadRewriteRule class in Crowd before version 4.0.4, and from version 4.1.0 before 4.1.2 allowed unauthenticated remote attackers to read arbitrary files within WEB-INF and META-INF directories via an incorrect path access check.

Which versions are affected by CVE-2020-36240?

It affects 1 product.

Products include Atlassian Crowd.

How do I fix CVE-2020-36240?

No fix has been published for CVE-2020-36240 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-36240 being exploited?

There is no known exploitation of CVE-2020-36240 in the wild and no public exploit code.

Other vulnerabilities in Atlassian Crowd

• CVE-2019-11580 Atlassian Crowd and Crowd Data Center Remote Code Execution Exploited Critical 9.8
• CVE-2022-43782 Auth bypass in Crowd Data Center Critical 9.8
• CVE-2016-6496 Deserialization in n/a Critical 9.8
• CVE-2017-18105 Auth bypass in Crowd High 8.1
• CVE-2018-20238 Auth bypass in Crowd High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-23rx-x963-qprq.