CVE-2021-42357

DOM based XSS Vulnerability in Apache Knox

Description

When using Apache Knox SSO prior to 1.6.1, a request could be crafted to redirect a user to a malicious page due to improper URL parsing. A request that included a specially crafted request parameter could be used to redirect the user to a page controlled by an attacker. This URL would need to be presented to the user outside the normal request flow through a XSS or phishing campaign.

Remediation

Workaround:

  • 1.x users should upgrade to 1.6.1. Unsupported versions of the 0.x line that include this issue are: 0.13.0, 0.14.0. and these should upgrade to 1.6.1 as well. 1.0.0 and 1.1.0 are also Unsupported but affected and should upgrade to 1.6.1.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 15.93% Top 10%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache Knox
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread/b7v5dkpyqb51nw0lvz4cybhgrfhk1g7j vendor advisory mailing list
http://www.openwall.com/lists/oss-security/2022/01/17/2 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-42357?
CVE-2021-42357 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42357?
As a workaround for remediating CVE-2021-42357: 1.x users should upgrade to 1.6.1. Unsupported versions of the 0.x line that include this issue are: 0.13.0, 0.14.0. and these should upgrade to 1.6.1 as well. 1.0.0 and 1.1.0 are also Unsupported but affected and should upgrade to 1.6.1.
Is CVE-2021-42357 being actively exploited in the wild?
It is possible that CVE-2021-42357 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-42357?
CVE-2021-42357 affects Apache Software Foundation Apache Knox.
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