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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ingvar, itamar, matthias, paul
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2019-11-29 01:04:49 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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.