Bug 1332820 (CVE-2016-4483)

Summary: CVE-2016-4483 libxml2: out-of-bounds read
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: athmanem, c.david86, csutherl, erik-fedora, fedora-mingw, gzaronik, jclere, jwalter, leonard-rh-bugzilla, lgao, mbabacek, mturk, myarboro, ohudlick, rjones, sardella, slawomir, twalsh, veillard, weli
Target Milestone: ---Keywords: Reopened, Security
Target Release: ---   
Hardware: All   
OS: Linux   
See Also: https://issues.redhat.com/browse/JWS-442
https://issues.redhat.com/browse/JBCS-103
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-21 00:52:26 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: 1332823, 1332824, 1332825, 1340369, 1340371    
Bug Blocks: 1332827, 1395463, 1434761    
Attachments:
Description Flags
Fix for CVE-2016-4483, upstream commit c97750d11bb8b6f3303e7131fe526a61ac65bcfd none

Description Andrej Nemec 2016-05-04 07:16:26 UTC 
A vulnerability was found in libxml2. Parsing a maliciously crafted xml file could cause the application to crash if recover mode is used.

References:

http://seclists.org/oss-sec/2016/q2/195
Comment 1 Andrej Nemec 2016-05-04 07:22:31 UTC 
Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1332823]
Comment 2 Andrej Nemec 2016-05-04 07:22:38 UTC 
Created mingw-libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1332824]
Affects: epel-7 [bug 1332825]
Comment 7 errata-xmlrpc 2016-12-15 22:18:17 UTC 
This issue has been addressed in the following products:



Via RHSA-2016:2957 https://rhn.redhat.com/errata/RHSA-2016-2957.html
Comment 9 Leonard den Ottolander 2017-03-21 15:04:49 UTC 
CVE-2016-4483 is NOT a duplicate of CVE-2016-3627!

This issue has NOT been fixed for at least RHEL6 (CVE-2016-3627 has been).

This issue was fixed upstream with commit c97750d11bb8b6f3303e7131fe526a61ac65bcfd

https://git.gnome.org/browse/libxml2/commit/?h=CVE-2016-4483&id=c97750d11bb8b6f3303e7131fe526a61ac65bcfd
Comment 10 Leonard den Ottolander 2017-03-21 15:06:32 UTC 
Created attachment 1265117 [details]
Fix for CVE-2016-4483, upstream commit c97750d11bb8b6f3303e7131fe526a61ac65bcfd

Upstream commit that fixes CVE-2016-4483.
Comment 11 Leonard den Ottolander 2017-03-21 15:12:52 UTC 
CVE-2016-4483 has also NOT been fixed for RHEL7. Patch applies cleanly.
Comment 12 Huzaifa S. Sidhpurwala 2017-03-23 05:34:43 UTC 
(In reply to Leonard den Ottolander from comment #9)
> CVE-2016-4483 is NOT a duplicate of CVE-2016-3627!
> 
> This issue has NOT been fixed for at least RHEL6 (CVE-2016-3627 has been).
> 
> This issue was fixed upstream with commit
> c97750d11bb8b6f3303e7131fe526a61ac65bcfd
> 
> https://git.gnome.org/browse/libxml2/commit/?h=CVE-2016-
> 4483&id=c97750d11bb8b6f3303e7131fe526a61ac65bcfd

Thanks for the update:

CVE-2016-3627 was fixed via:
https://git.gnome.org/browse/libxml2/commit/?id=bdd66182ef53fe1f7209ab6535fda56366bd7ac9

CVE-2016-4483 was fixed via:
https://git.gnome.org/browse/libxml2/commit/?id=c97750d11bb8b6f3303e7131fe526a61ac65bcfd
Comment 13 Huzaifa S. Sidhpurwala 2017-03-23 05:41:21 UTC 
Statement:

When a specially-crafted XML file is parsed via an application compiled against libxml2, this can cause the application to crash. (No code execution)
Comment 15 Doran Moppert 2019-01-21 01:07:13 UTC 
Upstream bug:

https://bugzilla.gnome.org/show_bug.cgi?id=766414