CVEvulnerability
CVE-2021-40524
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-09-05
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-434
Description
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.)
Affected configurations
• pureftpd pure-ftpd (>= 1.0.23 < 1.0.50)
Related
Weakness · CWE (1)
- CWE-434 Unrestricted Upload of File with Dangerous Type weakness
References
- https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4 Patch, Third Party Advisory
- https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50 Patch, Third Party Advisory
- https://github.com/jedisct1/pure-ftpd/pull/158 Exploit, Third Party Advisory
- https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4 Patch, Third Party Advisory
- https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50 Patch, Third Party Advisory
- https://github.com/jedisct1/pure-ftpd/pull/158 Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/11/msg00003.html lists.debian.org