CVE-2021-42121 Denial of Service via Invalid Date Format in TopEase

What is CVE-2021-42121?

CVE-2021-42121 is a medium-severity denial of service vulnerability in Business-DNA Solutions GmbH TopEase, published on 30 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH’s TopEase® Platform Version <= 7.1.27 on an object’s date attribute(s) allows an authenticated remote attacker with Object Modification privileges to insert an unexpected format into date fields, which leads to breaking the object page that the date field is present.

Weakness: CWE-20

Which versions are affected by CVE-2021-42121?

It affects 1 product.

Products include Businessdnasolutions Topease.

How do I fix CVE-2021-42121?

No fix has been published for CVE-2021-42121 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-42121 being exploited?

There is no known exploitation of CVE-2021-42121 in the wild and no public exploit code.

Other vulnerabilities in Business-DNA Solutions GmbH TopEase

• CVE-2021-42115 Missing HTTPOnly flag on sensitive cookie in TopEase High 8.1
• CVE-2021-42118 Stored XSS in TopEase High 8.1
• CVE-2021-42544 Lack of Rate limiting in Authentication in TopEase High 7.5
• CVE-2021-42119 Stored XSS in Search Function in TopEase High 7.3
• CVE-2021-42123 Missing Upload Filter in TopEase High 7.3

Sources

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

Also known as GHSA-52xf-jjg9-gfxx.