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CVE-2017-18258

Description

The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file. #### Bugs * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895245> * <https://bugzilla.gnome.org/show_bug.cgi?id=786696> #### Notes Author| Note ---|--- [leosilva](<https://launchpad.net/~leosilva>) | precise/esm hasn't support for LZMA [ccdm94](<https://launchpad.net/~ccdm94>) | the fix for this issue seems to introduce the vulnerability related to CVE-2018-9251.


Affected Package


OS OS Version Package Name Package Version
ubuntu 18.04 libxml2 2.9.4+dfsg1-6.1ubuntu1.2
ubuntu 14.04 libxml2 2.9.1+dfsg1-3ubuntu4.13
ubuntu upstream libxml2 2.9.6
ubuntu 16.04 libxml2 2.9.3+dfsg1-1ubuntu0.6

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