Bug 1277146 - (CVE-2015-8035) CVE-2015-8035 libxml2: DoS when parsing specially crafted XML document if XZ support is enabled
CVE-2015-8035 libxml2: DoS when parsing specially crafted XML document if XZ ...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 1277147 1277149 1277150 1322872
Blocks: 1274223 1277152 1318206
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Reported: 2015-11-02 08:45 EST by Adam Mariš
Modified: 2017-08-24 14:43 EDT (History)
20 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A denial of service flaw was found in libxml2. A remote attacker could provide a specially crafted XML or HTML file that, when processed by an application using libxml2, would cause that application to crash.
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Suggested patch for the issue (501 bytes, patch)
2015-11-02 11:46 EST, Daniel Veillard
no flags Details | Diff

  None (edit)
Description Adam Mariš 2015-11-02 08:45:30 EST
A vulnerability in libxml2 when parsing specially crafted XML document if XZ support is enabled causing DoS of application was found.

CVE request (including reproducer):

Comment 1 Adam Mariš 2015-11-02 08:46:11 EST
Created libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1277147]
Comment 2 Adam Mariš 2015-11-02 08:46:19 EST
Created mingw-libxml2 tracking bugs for this issue:

Affects: fedora-all [bug 1277149]
Affects: epel-7 [bug 1277150]
Comment 3 Martin Prpič 2015-11-02 09:16:34 EST

This issue did not affect the versions of libxml2 as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include support for LZMA compression support.
Comment 4 Martin Prpič 2015-11-02 09:58:21 EST
LZMA compression support was introduced in libxml2 in:

2.8.0: May 23 2012
Features: add lzma compression support (Anders F Bjorklund)
Comment 5 Daniel Veillard 2015-11-02 11:45:39 EST
So lzma support in 2.9.2 seems to be broken that's why Fedora seems not affected.

But the bug is present since all version 2.8.0 onward.
Seems I managed to get a first fix for the issue, I will add as attachment

Comment 6 Daniel Veillard 2015-11-02 11:46 EST
Created attachment 1088640 [details]
Suggested patch for the issue
Comment 13 errata-xmlrpc 2016-05-17 12:14:02 EDT
This issue has been addressed in the following products:

Via RHSA-2016:1089 https://rhn.redhat.com/errata/RHSA-2016-1089.html

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