CVE-2024-23826: Uploading an image with a specific filename causes a server-side DoS
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.
Classification
CVE ID: CVE-2024-23826
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H
Affected Products
Vendor: spbu-se
Product: spbu_se_site
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.12% (probability of being exploited)
EPSS Percentile: 32.1% (scored less or equal to compared to others)
EPSS Date: 2025-06-08 (when was this score calculated)
Stakeholder-Specific Vulnerability Categorization (SSVC)
SSVC Exploitation: poc
SSVC Technical Impact: partial
SSVC Automatable: false
References
https://nvd.nist.gov/vuln/detail/CVE-2024-23826https://github.com/spbu-se/spbu_se_site/security/advisories/GHSA-5vfc-v7hg-pvwm
https://github.com/spbu-se/spbu_se_site/commit/5ad623eb0405260763046343c5785bc588d8a57d