Vulnerability Monitor

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CVE-2021-40524

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.)

Published

2021-09-05T19:15:15.080

Last Modified

2024-11-21T06:24:19.140

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-434

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	pureftpd	pure-ftpd	< 1.0.50	Yes

References

https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4 Patch, Third Party Advisory ([email protected])
https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50 Patch, Third Party Advisory ([email protected])
https://github.com/jedisct1/pure-ftpd/pull/158 Exploit, Third Party Advisory ([email protected])
https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/jedisct1/pure-ftpd/pull/158 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)