Bug 1777975 (CVE-2019-19269) - CVE-2019-19269 proftpd: NULL pointer dereference when validating the certificate of a client connecting to the server
Summary: CVE-2019-19269 proftpd: NULL pointer dereference when validating the certific...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2019-19269
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1777976 1777977 1777978 1778206
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-11-28 20:49 UTC by Guilherme de Almeida Suckevicz
Modified: 2019-11-29 13:50 UTC (History)
4 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2019-11-29 01:04:49 UTC


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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.


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