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Vulnerability details: VCID-zew4-4yut-aaap
Vulnerability ID VCID-zew4-4yut-aaap
Aliases CVE-2016-4449
Summary Improper Input Validation XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
generic_textual Medium http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html
generic_textual Medium http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
generic_textual Medium http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html
generic_textual Medium http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
generic_textual Medium http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-4449.html
rhas Important https://access.redhat.com/errata/RHSA-2016:2957
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
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epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.0014 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00163 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00185 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.00794 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.01033 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
epss 0.01071 https://api.first.org/data/v1/epss?cve=CVE-2016-4449
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1338701
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8806
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1762
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1833
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1834
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1835
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1836
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1837
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1838
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1839
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1840
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2073
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3627
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3705
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4447
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4449
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4483
cvssv2 4.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.8 https://nvd.nist.gov/vuln/detail/CVE-2016-4449
cvssv3 7.1 https://nvd.nist.gov/vuln/detail/CVE-2016-4449
generic_textual Medium https://support.apple.com/HT206899
generic_textual Medium https://support.apple.com/HT206901
generic_textual Medium https://support.apple.com/HT206902
generic_textual Medium https://support.apple.com/HT206903
generic_textual Medium https://support.apple.com/HT206904
generic_textual Medium https://support.apple.com/HT206905
generic_textual Low https://ubuntu.com/security/notices/USN-2994-1
cvssv3.1 7.5 https://www.debian.org/security/2016/dsa-3593
generic_textual HIGH https://www.debian.org/security/2016/dsa-3593
cvssv3.1 6.1 https://www.tenable.com/security/tns-2016-18
generic_textual HIGH https://www.tenable.com/security/tns-2016-18
cvssv3.1 7.5 http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
generic_textual HIGH http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
cvssv3.1 7.5 http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
generic_textual HIGH http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
cvssv3.1 7.5 http://www.ubuntu.com/usn/USN-2994-1
generic_textual HIGH http://www.ubuntu.com/usn/USN-2994-1
cvssv3.1 7.5 http://xmlsoft.org/news.html
generic_textual HIGH http://xmlsoft.org/news.html
Reference id Reference type URL
http://jvndb.jvn.jp/en/contents/2017/JVNDB-2017-000066.html
http://jvn.jp/en/jp/JVN17535578/index.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-4449.html
http://rhn.redhat.com/errata/RHSA-2016-2957.html
https://access.redhat.com/errata/RHSA-2016:1292
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-4449.json
https://api.first.org/data/v1/epss?cve=CVE-2016-4449
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8806
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1762
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1833
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1834
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1835
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1836
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1837
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1838
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1839
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1840
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2073
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3627
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3705
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4447
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4449
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4483
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://git.gnome.org/browse/libxml2/commit/?id=b1d34de46a11323fccffa9fadeb33be670d602f5
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709
https://kc.mcafee.com/corporate/index?page=content&id=SB10170
https://support.apple.com/HT206899
https://support.apple.com/HT206901
https://support.apple.com/HT206902
https://support.apple.com/HT206903
https://support.apple.com/HT206904
https://support.apple.com/HT206905
https://support.cybozu.com/ja-jp/article/9735
https://ubuntu.com/security/notices/USN-2994-1
https://www.debian.org/security/2016/dsa-3593
https://www.tenable.com/security/tns-2016-18
http://www.openwall.com/lists/oss-security/2016/05/25/2
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securityfocus.com/bid/90865
http://www.securitytracker.com/id/1036348
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.404722
http://www.ubuntu.com/usn/USN-2994-1
http://xmlsoft.org/news.html
1338701 https://bugzilla.redhat.com/show_bug.cgi?id=1338701
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
CVE-2016-4449 https://nvd.nist.gov/vuln/detail/CVE-2016-4449
RHSA-2016:2957 https://access.redhat.com/errata/RHSA-2016:2957
USN-2994-1 https://usn.ubuntu.com/2994-1/
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2016-4449
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2016-4449
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.debian.org/security/2016/dsa-3593
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.tenable.com/security/tns-2016-18
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at http://www.ubuntu.com/usn/USN-2994-1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at http://xmlsoft.org/news.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.32288
EPSS Score 0.00121
Published At April 15, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
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