Bug 2041803 (CVE-2021-40524)

Summary:	CVE-2021-40524 pure-ftpd: unbounded file size in file upload
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	alain.vigne.14
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-01-18 11:01:09 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2041804, 2041805
Bug Blocks:

Description Dhananjay Arunesh 2022-01-18 10:19:37 UTC

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.)

References:
https://github.com/jedisct1/pure-ftpd/pull/158
https://github.com/jedisct1/pure-ftpd/commit/37ad222868e52271905b94afea4fc780d83294b4
https://github.com/jedisct1/pure-ftpd/compare/1.0.49...1.0.50

Comment 1 Dhananjay Arunesh 2022-01-18 10:19:57 UTC

Created gerbv tracking bugs for this issue:

Affects: epel-all [bug 2041805]
Affects: fedora-all [bug 2041804]

Comment 2 Product Security DevOps Team 2022-01-18 11:01:06 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.