Resource exhaustion in Torchbox Wagtail
CVE-2023-28837
Wagtail is an open source content management system built on Django. Prior to versions 4.1.4 and 4.2.2, a memory exhaustion bug exists in Wagtail's handling of uploaded images and documents. For both images and documents, files are loaded into memory during upload for additional processing. A user with access to upload images or documents through the Wagtail admin interface could upload a file so large that it results in a crash of denial of service. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. It can only be exploited by admin users with permission to upload images or documents. Image uploads are restricted to 10MB by default, however this validation only happens on the frontend and on the backend after the vulnerable code. Patched versions have been released as Wagtail 4.1.4 and Wagtail 4.2.2). Site owners who are unable to upgrade to the new versions are encouraged to add extra protections outside of Wagtail to limit the size of uploaded files.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Torchbox Wagtail
- Wagtail — versions < 4.1.4, >= 4.2, < 4.2.2
Weakness classification (CWE)
References
- github.com/wagtail/wagtail/security/advisories/GHSA-33pv-vcgh-jfg9 (Mitigation, Vendor Advisory)
- github.com/wagtail/wagtail/commit/3c0c64642b9e5b8d28b111263c7f4bddad6c3880 (Patch)
- github.com/wagtail/wagtail/commit/c9d2fcd650a88d76ae122646142245e5927a9165 (Release Notes)
- github.com/wagtail/wagtail/commit/cfa11bbe00dbe7ce8cd4c0bbfe2a898a690df2bf (Patch)
- github.com/wagtail/wagtail/commit/d4022310cbe497993459c3136311467c7ac6329a (Release Notes)
- docs.wagtail.org/en/stable/reference/settings.html (Product)
- github.com/wagtail/wagtail/releases/tag/v4.1.4 (Release Notes)
- github.com/wagtail/wagtail/releases/tag/v4.2.2 (Release Notes)
Frequently asked questions
- What is CVE-2023-28837?
- CVE-2023-28837 is a medium-severity vulnerability in Torchbox Wagtail, classified under Uncontrolled Resource Consumption. CVSS score: 4.9/10. Published 2023-04-03.
- How severe is CVE-2023-28837?
- Medium severity. CVSS v3 base score is 4.9 out of 10.