CVE-2016-9318

Description

libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.

CVSS Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.12%• Percentile: 30%

Techniques & Countermeasures

• CWE-611•Improper Restriction of XML External Entity Reference

  The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Affected Systems

• canonical•ubuntu_linux

  12.04 | 14.04 | 16.04 | 18.04

• xmlsoft•libxml2

  ≤ 2.9.4

References (7)

• https://bugzilla.gnome.org/show_bug.cgi?id=772726
• https://github.com/lsh123/xmlsec/issues/43
• https://usn.ubuntu.com/3739-1/
• https://security.gentoo.org/glsa/201711-01
• http://www.securityfocus.com/bid/94347
• https://usn.ubuntu.com/3739-2/
• https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html