CVE-2023-3042 CNA SHORTNAME: dotCMSORG UUID: 5b9d93f2-25c7-46b4-ab60-d201718c9dd8
Attackers can bypass XSS and access controls by using double slashes in URLs, potentially executing malicious scripts or accessing restricted resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-3042?
CVE-2023-3042 is a medium-severity cross-site scripting vulnerability in Dotcms Dotcms, published on 17 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In dotCMS, versions mentioned, a flaw in the NormalizationFilter does not strip double slashes (//) from URLs, potentially enabling bypasses for XSS and access controls. An example affected URL is https://demo.dotcms.com//html/portlet/ext/files/edit_text_inc.jsp , which should return a 404 response but didn't.
The oversight in the default invalid URL character list can be viewed at the provided GitHub link https://github.com/dotCMS/core/blob/master/dotCMS/src/main/java/com/dotcms/filters/NormalizationFilter.java#L37 .
To mitigate, users can block URLs with double slashes at firewalls or utilize dotCMS config variables.
Specifically, they can use the DOT_URI_NORMALIZATION_FORBIDDEN_STRINGS environmental variable to add // to the list of invalid strings.
Additionally, the DOT_URI_NORMALIZATION_FORBIDDEN_REGEX variable offers more detailed control, for instance, to block //html.* URLs.
Fix Version:23.06+, LTS 22.03.7+, LTS 23.01.4+
Weakness: CWE-79
Which versions are affected by CVE-2023-3042?
It affects 1 product.
Products include Dotcms Dotcms.
How do I fix CVE-2023-3042?
No fix has been published for CVE-2023-3042 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-3042 being exploited?
There is no known exploitation of CVE-2023-3042 in the wild and no public exploit code.
Other vulnerabilities in Dotcms Dotcms
Sources
Also known as GHSA-4473-7649-rj9x.