CVE-2017-16931

parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://xmlsoft.org/news.html	Release Notes Vendor Advisory
https://bugzilla.gnome.org/show_bug.cgi?id=766956	Permissions Required
https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
https://www.oracle.com//security-alerts/cpujul2021.html
http://xmlsoft.org/news.html	Release Notes Vendor Advisory
https://bugzilla.gnome.org/show_bug.cgi?id=766956	Permissions Required
https://github.com/GNOME/libxml2/commit/e26630548e7d138d2c560844c43820b6767251e3	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00041.html
https://www.oracle.com//security-alerts/cpujul2021.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*

History

14 Oct 2026, 07:16

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-398330.html -

Information

Published : 2017-11-23 21:29

Updated : 2026-10-14 07:16

NVD link : CVE-2017-16931

Mitre link : CVE-2017-16931

CVE.ORG link : CVE-2017-16931

JSON object : View

Products Affected

xmlsoft

libxml2

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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