// For flags

CVE-2016-4449

libxml2: Inappropriate fetch of entities content

Severity Score

7.1
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.

Vulneravilidad de XML external entity (XXE) en la función xmlStringLenDecodeEntities en parser.c en libxml2 en versiones anteriores a 2.9.4, cuando no está en modo de validación, permite a atacantes dependientes del contexto leer archivos arbitrarios o provocar una denegación del servicio (consumo de recursos) a través de vectores no especificados.

It was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could possibly cause libxml2 to crash, resulting in a denial of service. CVE-2016-3627,CVE-2016-3705, It was discovered that libxml2 incorrectly handled certain malformed documents. If a user or automated system were tricked into opening a specially crafted document, an attacker could cause libxml2 to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Partial
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2016-05-02 CVE Reserved
  • 2016-05-27 CVE Published
  • 2024-08-06 CVE Updated
  • 2025-06-19 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
References (32)
URL Tag Source
http://jvn.jp/en/jp/JVN17535578/index.html Third Party Advisory
http://jvndb.jvn.jp/en/contents/2017/JVNDB-2017-000066.html Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/05/25/2 Mailing List
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html X_refsource_confirm
http://www.securityfocus.com/bid/90865 Vdb Entry
http://www.securitytracker.com/id/1036348 Vdb Entry
http://xmlsoft.org/news.html X_refsource_confirm
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709 X_refsource_confirm
https://kc.mcafee.com/corporate/index?page=content&id=SB10170 X_refsource_confirm
https://support.apple.com/HT206899 X_refsource_confirm
https://support.apple.com/HT206901 X_refsource_confirm
https://support.apple.com/HT206902 X_refsource_confirm
https://support.apple.com/HT206903 X_refsource_confirm
https://support.apple.com/HT206904 X_refsource_confirm
https://support.apple.com/HT206905 X_refsource_confirm
https://support.cybozu.com/ja-jp/article/9735 X_refsource_confirm
https://www.tenable.com/security/tns-2016-18 X_refsource_confirm
URL Date SRC
URL Date SRC
URL Date SRC
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html 2018-01-18
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html 2018-01-18
http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html 2018-01-18
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html 2018-01-18
http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html 2018-01-18
http://rhn.redhat.com/errata/RHSA-2016-2957.html 2018-01-18
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.404722 2018-01-18
http://www.ubuntu.com/usn/USN-2994-1 2018-01-18
https://access.redhat.com/errata/RHSA-2016:1292 2018-01-18
https://git.gnome.org/browse/libxml2/commit/?id=b1d34de46a11323fccffa9fadeb33be670d602f5 2018-01-18
https://www.debian.org/security/2016/dsa-3593 2018-01-18
https://access.redhat.com/security/cve/CVE-2016-4449 2016-12-15
https://bugzilla.redhat.com/show_bug.cgi?id=1338701 2016-12-15
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 8.0
Search vendor "Debian" for product "Debian Linux" and version "8.0"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 12.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 14.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 15.10
Search vendor "Canonical" for product "Ubuntu Linux" and version "15.10"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 16.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"
lts
Affected
Xmlsoft
Search vendor "Xmlsoft"
 Libxml2
Search vendor "Xmlsoft" for product "Libxml2"
 <= 2.9.3
Search vendor "Xmlsoft" for product "Libxml2" and version " <= 2.9.3"
-
Affected