Bug 1025718 (CVE-2013-4488) - CVE-2013-4488 libgadu: missing ssl certificate validation
Summary: CVE-2013-4488 libgadu: missing ssl certificate validation
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2013-4488
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20130602,repor...
Depends On: 1025719 1026505
Blocks: 1025720
TreeView+ depends on / blocked
 
Reported: 2013-11-01 11:21 UTC by Ratul Gupta
Modified: 2019-06-08 19:46 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-03-10 17:25:20 UTC


Attachments (Terms of Use)

Description Ratul Gupta 2013-11-01 11:21:50 UTC
Libgadu, an open library for communicating using the protocol e-mail, was found to have missing the ssl certificate validation. The issue is that libgadu uses openSSL library for creating secure connections. A program using openSSL can perform SSL handshake by invoking the SSL_connect function. Some cetrificate validation errors are signaled through, the return values of the SSL_connect, while for the others errors SSL_connect returns OK but sets internal "verify result" flags. Application must call ssl_get_verify_result function to check if any such errors occurred.  This check seems to be missing in libgadu. And thus a man-in-the-middle attack is possible failing all the SSL protection.

Upstream suggested that it was a concious decision as libgadu is reverse-engineered implementation of a proprietary protocol, they had no control over the certificates used for SSL connections, so they would add a note to the documentation about this.

References:
http://seclists.org/oss-sec/2013/q4/202
https://bugzilla.novell.com/show_bug.cgi?id=848509
http://www.mail-archive.com/libgadu-devel@lists.ziew.org/msg01017.html

Comment 1 Ratul Gupta 2013-11-01 11:22:46 UTC
Created libgadu tracking bugs for this issue:

Affects: fedora-all [bug 1025719]

Comment 4 Fedora Update System 2013-12-28 02:02:55 UTC
libgadu-1.12.0-0.2.rc1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2013-12-28 02:03:40 UTC
libgadu-1.12.0-0.2.rc1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Dominik 'Rathann' Mierzejewski 2015-02-10 08:57:57 UTC
Can this be closed?


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