CVE-2024-23826 Uploading an image with a specific filename causes a server-side DoS
An authenticated user can cause a server-side denial of service on Windows by uploading an avatar with a large Unicode filename.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-23826?
CVE-2024-23826 is a medium-severity denial of service vulnerability in spbu-se spbu_se_site, published on 29 Jan 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
spbu_se_site is the website of the Department of System Programming of St. Petersburg State University. Before 2024.01.29, when uploading an avatar image, an authenticated user may intentionally use a large Unicode filename which would lead to a server-side denial of service under Windows. This is due to no limitation of the length of the filename and the costly use of the Unicode normalization with the form NFKD on Windows OS. This vulnerability was fixed in the 2024.01.29 release.
Weakness: CWE-770
Which versions are affected by CVE-2024-23826?
It affects 1 product.
Products include Se.math.spbu Spbu Se Site.
How do I fix CVE-2024-23826?
No fix has been published for CVE-2024-23826 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-2024-23826 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-23826 exists.
Sources
Also known as GHSA-5vfc-v7hg-pvwm.