Bug 1778258 (CVE-2019-19270)

Summary:	CVE-2019-19270 proftpd: failure to check for the appropriate field of a CRL entry prevents some valid CRLs from being taken into account
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 19:04:54 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:	1778260, 1778261
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2019-11-29 16:22:08 UTC

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Reference:
https://github.com/proftpd/proftpd/issues/859

Comment 1 Guilherme de Almeida Suckevicz 2019-11-29 16:24:16 UTC

Created proftpd tracking bugs for this issue:

Affects: epel-all [bug 1778261]
Affects: fedora-all [bug 1778260]

Comment 2 Product Security DevOps Team 2019-11-29 19:04:54 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.