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vulnerability announce CVE-2017-15412

libxml2: use after free via xmlXPathCompOpEvalPositionalPredicate

Synthesis of the vulnerability

An attacker can force the usage of a freed memory area via xmlXPathCompOpEvalPositionalPredicate() of libxml2, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Debian, Fedora, Chrome, libxml, openSUSE Leap, Opera, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this weakness: 2/4.
Consequences of a hack: user access/rights, denial of service on service, denial of service on client.
Hacker's origin: document.
Creation date: 13/12/2017.
Références of this bulletin: CVE-2017-15412, DLA-1211-1, DSA-4064-1, DSA-4086-1, FEDORA-2017-c2645aa935, FEDORA-2017-ea44f172e3, FEDORA-2018-faff5f661e, openSUSE-SU-2017:3244-1, openSUSE-SU-2017:3245-1, openSUSE-SU-2018:0418-1, RHSA-2017:3401-01, USN-3513-1, USN-3513-2, VIGILANCE-VUL-24762.

Description of the vulnerability

An attacker can force the usage of a freed memory area via xmlXPathCompOpEvalPositionalPredicate() of libxml2, in order to trigger a denial of service, and possibly to run code.
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