CVE-2016-4449
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
02 Description
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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 76.2% of scored records. A rank, not a probability.
- NVD base score
- 7.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-06-09 16:00Z10 YR AGO
- Last updated
- 2024-08-06 00:32Z2 YR AGO
- Reserved
- 2016-05-02
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- 205b80ad698a07af6e5c7674031a566bfc91519298c1006de7bf52141db3629c
05 Affected products
06 References
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- support.cybozu.comhttps://support.cybozu.com/ja-jp/article/9735
- kc.mcafee.comhttps://kc.mcafee.com/corporate/index?page=content&id=SB10170
- www.slackware.comSSA:2016-148-01http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.404722
- www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- jvn.jpJVN#17535578http://jvn.jp/en/jp/JVN17535578/index.html
- access.redhat.comRHSA-2016:1292https://access.redhat.com/errata/RHSA-2016:1292
- www.openwall.com[oss-security] 20160525 3 libxml2 issueshttp://www.openwall.com/lists/oss-security/2016/05/25/2
- www.debian.orgDSA-3593https://www.debian.org/security/2016/dsa-3593
- lists.apple.comAPPLE-SA-2016-07-18-4http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
- lists.apple.comAPPLE-SA-2016-07-18-3http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html
- lists.apple.comAPPLE-SA-2016-07-18-2http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
- xmlsoft.orghttp://xmlsoft.org/news.html
- support.apple.comhttps://support.apple.com/HT206901
- www.ubuntu.comUSN-2994-1http://www.ubuntu.com/usn/USN-2994-1
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- lists.apple.comAPPLE-SA-2016-07-18-1http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html
- jvndb.jvn.jpJVNDB-2017-000066http://jvndb.jvn.jp/en/contents/2017/JVNDB-2017-000066.html
- lists.apple.comAPPLE-SA-2016-07-18-6http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html
- www.tenable.comhttps://www.tenable.com/security/tns-2016-18
- www.securityfocus.com90865http://www.securityfocus.com/bid/90865
- git.gnome.orghttps://git.gnome.org/browse/libxml2/commit/?id=b1d34de46a11323fccffa9fadeb33be670d602f5
- rhn.redhat.comRHSA-2016:2957http://rhn.redhat.com/errata/RHSA-2016-2957.html
- support.apple.comhttps://support.apple.com/HT206905
- www.securitytracker.com1036348http://www.securitytracker.com/id/1036348
- support.apple.comhttps://support.apple.com/HT206903
- support.apple.comhttps://support.apple.com/HT206902
- support.apple.comhttps://support.apple.com/HT206904
- h20566.www2.hpe.comhttps://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709
- support.apple.comhttps://support.apple.com/HT206899
07 Fixed in
Debian 12
- libxml2 Fixed in 2.9.3+dfsg1-1.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libxml2 Fixed in 2.9.3+dfsg1-1.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libxml2 Fixed in 2.9.3+dfsg1-1.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- libxml2 Fixed in 2.9.1+dfsg1-3ubuntu4.8
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- libxml2 Fixed in 2.9.3+dfsg1-1ubuntu0.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.