XXE in Apache Tika
CVE-2016-4434
Apache Tika before 1.13 does not properly initialize the XML parser or choose handlers, which might allow remote attackers to conduct XML External Entity (XXE) attacks via vectors involving (1) spreadsheets in OOXML files and (2) XMP metadata in PDF and other file formats, a related issue to CVE-2016-2175.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.036 (89.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: -0.000
Affected products
- Apache Tika — versions 1.12
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/archive/1/538500/100/0/threaded (mailing-list)
- mail-archives.apache.org/mod_mbox/tika-dev/201605.mbox/<1705136517.1175366.1464… (Vendor Advisory, mailing-list, Mailing List)
- rhn.redhat.com/errata/RHSA-2017-0272.html (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2017-0248.html (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2017-0249.html (vendor-advisory)
- lists.apache.org/thread.html/708d94141126eac03011144a971a6411fcac16d9c248d1d535… (mailing-list)
Frequently asked questions
- What is CVE-2016-4434?
- CVE-2016-4434 is a high-severity vulnerability in Apache Tika, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.8/10. Published 2017-09-30.
- How severe is CVE-2016-4434?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2016-4434 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.