CVE-2023-42457: plone.rest vulnerable to Denial of Service when ++api++ is used many times
First published: Thu Sep 21 2023(Updated: )
### Impact When the `++api++` traverser is accidentally used multiple times in a url, handling it takes increasingly longer, making the server less responsive. ### Patches Patches will be released in `plone.rest` 2.0.1 and 3.0.1. Series 1.x is not affected. ### Workarounds In your frontend web server (nginx, Apache) you can redirect `/++api++/++api++` to `/++api++`.
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Plone Rest | =2.0.0 | |
| Plone Rest | =3.0.0 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2023/09/22/2
- https://github.com/plone/plone.rest/commit/43b4a7e86206e237e1de5ca3817ed071575882f7
- https://github.com/plone/plone.rest/commit/77846a9842889b24f35e8bedc2e9d461388d3302
- https://github.com/plone/plone.rest/security/advisories/GHSA-h6rp-mprm-xgcq
- https://nvd.nist.gov/vuln/detail/CVE-2023-42457
- https://github.com/pypa/advisory-database/tree/main/vulns/plone-rest/PYSEC-2023-178.yaml
- https://github.com/advisories/GHSA-h6rp-mprm-xgcq (Advisory)
Frequently Asked Questions
What is the impact of CVE-2023-42457?
When the `++api++` traverser is accidentally used multiple times in a URL, handling it takes increasingly longer, making the server less responsive.
How can plone.rest users be affected by CVE-2023-42457?
plone.rest users can be affected if they accidentally use the `++api++` traverser multiple times in a URL.
What is the severity of CVE-2023-42457?
CVE-2023-42457 has a severity rating of 7.5 (High).
What is the recommended remedy for CVE-2023-42457 in plone.rest?
For versions 2.x prior to 2.0.1 and 3.x prior to 3.0.1, upgrading to version 2.0.1 or 3.0.1 respectively is recommended.
Are there any references available for CVE-2023-42457?
Yes, you can find references for CVE-2023-42457 at the following links: [GitHub Advisory](https://github.com/plone/plone.rest/security/advisories/GHSA-h6rp-mprm-xgcq) and [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-42457).
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