Bug 1154909 (CVE-2014-3695)

Summary: CVE-2014-3695 pidgin: crash in Mxit protocol plug-in
Product: [Other] Security Response Reporter: Murray McAllister <mmcallis>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cschalle, debarshir, mbarnes, security-response-team, sisharma, vdanen
Target Milestone: ---Keywords: Reopened, Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: pidgin 2.10.10 Doc Type: Bug Fix
Doc Text:
A denial of service flaw was found in the way Pidgin's Mxit plug-in handled emoticons. A malicious remote server or a man-in-the-middle attacker could potentially use this flaw to crash Pidgin by sending a specially crafted emoticon.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 02:35:18 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: 1155838, 1340770, 1403136, 1446519    
Bug Blocks: 1154913, 1415638    
Attachments:
Description Flags
patch from upstream none

Description Murray McAllister 2014-10-21 03:19:33 UTC 
A flaw was found in the MXit protocol plug-in. A malicious server or man-in-the-middle attacker could trigger this issue and cause Pidgin to crash by sending a specially-crafted emoticon.

Acknowledgements:

Name: the Pidgin project
Upstream: Yves Younan (Cisco Talos), Richard Johnson (Cisco Talos)
Comment 1 Murray McAllister 2014-10-21 03:20:39 UTC 
Created attachment 948787 [details]
patch from upstream
Comment 3 Murray McAllister 2014-10-23 01:21:02 UTC 
Public now:

http://www.pidgin.im/news/security/?id=87
Comment 4 Murray McAllister 2014-10-23 01:26:56 UTC 
Created pidgin tracking bugs for this issue:

Affects: fedora-all [bug 1155838]
Comment 5 Fedora Update System 2014-11-10 06:31:37 UTC 
pidgin-2.10.10-2.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2014-11-10 06:47:37 UTC 
pidgin-2.10.10-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 8 Siddharth Sharma 2014-12-02 05:35:03 UTC 
Analysis
========

1. In fuction,  asn_getUtf8( const gchar* data, gsize data_len, gchar type, char** utf8 ) which is part of mxit protocol.
 {
 	unsigned int len;
 	gchar *out_str;
 	...
2. malloc and and memcpy is done without checking the length being passed, which is the length of the emoticon being sent or used which can cause crash by sending specially crafted emoticon.
 	out_str = g_malloc(len + 1);
 	memcpy(out_str, &data[2], len); /* data field */
Comment 14 errata-xmlrpc 2017-08-01 20:20:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1854 https://access.redhat.com/errata/RHSA-2017:1854