VDB
CVE-2021-40524
CVE-2021-40524
PUBLISHED
CVSS 7.5 HIGH
In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)
EPSS 4.28% · 90.5th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
4.28%
90.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| pureftpd | pure-ftpd | 1.0.23 |
Timeline
- Sep 5, 2021 CVE Published
- Sep 6, 2021 EPSS Score
- Nov 3, 2021 EPSS Score
- Dec 31, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 27, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jun 22, 2022 EPSS Score
- Aug 20, 2022 EPSS Score
- Dec 14, 2022 EPSS Score
- Feb 10, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
References
- Nuclei Template exploit
- https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50 url
- https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4 url
- https://github.com/jedisct1/pure-ftpd/pull/158 url
- https://lists.debian.org/debian-lts-announce/2025/11/msg00003.html url
- https://nvd.nist.gov/vuln/detail/CVE-2021-40524 advisory