Bug 1778231 (CVE-2019-19271)

Summary:	CVE-2019-19271 proftpd: A wrong iteration variable, used when checking a client certificate against CRL entries, can cause some CRL entries to be ignored
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ingvar, itamar, matthias, paul
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:	2019-11-29 19:04:52 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:	1778232, 1778233
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2019-11-29 14:31:47 UTC

An issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. A wrong iteration variable, used when checking a client certificate against CRL entries (installed by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Reference:
https://github.com/proftpd/proftpd/issues/860

Comment 1 Guilherme de Almeida Suckevicz 2019-11-29 14:32:45 UTC

Created proftpd tracking bugs for this issue:

Affects: epel-all [bug 1778233]
Affects: fedora-all [bug 1778232]

Comment 2 Product Security DevOps Team 2019-11-29 19:04:52 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.