Bug 1777975 (CVE-2019-19269)

Summary:	CVE-2019-19269 proftpd: NULL pointer dereference when validating the certificate of a client connecting to the server
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:	low	Docs Contact:
Priority:	low
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 01:04:49 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:	1777976, 1777977, 1777978, 1778206
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2019-11-28 20:49:30 UTC

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.

Comment 1 Guilherme de Almeida Suckevicz 2019-11-28 20:49:46 UTC

Created proftpd tracking bugs for this issue:

Affects: epel-6 [bug 1777977]
Affects: epel-7 [bug 1777978]
Affects: fedora-all [bug 1777976]

Comment 2 Product Security DevOps Team 2019-11-29 01:04:49 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.

Comment 3 Paul Howarth 2019-11-29 11:20:07 UTC

(In reply to Guilherme de Almeida Suckevicz from comment #1)
> Created proftpd tracking bugs for this issue:
> 
> Affects: epel-6 [bug 1777977]
> Affects: epel-7 [bug 1777978]
> Affects: fedora-all [bug 1777976]

Also affects epel-8-playground, fixed in proftpd-1.3.6b-2.epel8.playground.

Comment 4 Guilherme de Almeida Suckevicz 2019-11-29 12:54:03 UTC

In reply to comment #3:
> Also affects epel-8-playground, fixed in proftpd-1.3.6b-2.epel8.playground.

Thank you for letting me know that. Do you need a bug for proftpd in epel-8?

Comment 5 Paul Howarth 2019-11-29 13:39:52 UTC

(In reply to Guilherme de Almeida Suckevicz from comment #4)
> In reply to comment #3:
> > Also affects epel-8-playground, fixed in proftpd-1.3.6b-2.epel8.playground.
> 
> Thank you for letting me know that. Do you need a bug for proftpd in epel-8?

Not unless it helps your tracking. I've already built the updated version and it'll go out with the next push.

Comment 6 Guilherme de Almeida Suckevicz 2019-11-29 13:49:20 UTC

Created proftpd tracking bugs for this issue:

Affects: epel-8 [bug 1778206]

Comment 7 Guilherme de Almeida Suckevicz 2019-11-29 13:50:15 UTC

In reply to comment #5:
> Not unless it helps your tracking. I've already built the updated version
> and it'll go out with the next push.

It's created, thank you Paul.