Bug 1025718 - (CVE-2013-4488) CVE-2013-4488 libgadu: missing ssl certificate validation
CVE-2013-4488 libgadu: missing ssl certificate validation
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
: ---
: ---
Assigned To: Red Hat Product Security
: Security
Depends On: 1025719 1026505
Blocks: 1025720
  Show dependency treegraph
Reported: 2013-11-01 07:21 EDT by Ratul Gupta
Modified: 2016-03-11 03:50 EST (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2016-03-10 12:25:20 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Ratul Gupta 2013-11-01 07:21:50 EDT
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.

Comment 1 Ratul Gupta 2013-11-01 07:22:46 EDT
Created libgadu tracking bugs for this issue:

Affects: fedora-all [bug 1025719]
Comment 4 Fedora Update System 2013-12-27 21:02:55 EST
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 2013-12-27 21:03:40 EST
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 03:57:57 EST
Can this be closed?

Note You need to log in before you can comment on or make changes to this bug.