CVE-2021-40524

nvd nist nuclei

Published: Sep 5, 2021Modified: Nov 4, 2025

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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 (1)

Products: Pureftpd: Pure Ftpd

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Pureftpd Pure Ftpd	From 1.0.23 to 1.0.50

Related CWEs

Unrestricted Upload of File with Dangerous Type

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

References (7)

https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4

Source: cve@mitre.org

PatchThird Party Advisory

https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50

Source: cve@mitre.org

PatchThird Party Advisory

https://github.com/jedisct1/pure-ftpd/pull/158

Source: cve@mitre.org

ExploitThird Party Advisory

https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://github.com/jedisct1/pure-ftpd/pull/158

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitThird Party Advisory

https://lists.debian.org/debian-lts-announce/2025/11/msg00003.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.