CVE Vulnerabilities

CVE-2017-5661

Improper Restriction of XML External Entity Reference

Published: Apr 18, 2017 | Modified: Apr 20, 2025
CVSS 3.x
7.3
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H
CVSS 2.x
7.9 HIGH
AV:N/AC:M/Au:S/C:C/I:N/A:C
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Ubuntu
MEDIUM

In Apache FOP before 2.2, files lying on the filesystem of the server which uses FOP can be revealed to arbitrary users who send maliciously formed SVG files. The file types that can be shown depend on the user context in which the exploitable application is running. If the user is root a full compromise of the server - including confidential or sensitive files - would be possible. XXE can also be used to attack the availability of the server via denial of service as the references within a xml document can trivially trigger an amplification attack.

Weakness

The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Affected Software

Name Vendor Start Version End Version
Formatting_objects_processor Apache * 2.1 (including)
Fop Ubuntu artful *
Fop Ubuntu esm-apps/xenial *
Fop Ubuntu precise *
Fop Ubuntu trusty *
Fop Ubuntu upstream *
Fop Ubuntu xenial *
Fop Ubuntu yakkety *
Fop Ubuntu zesty *

Potential Mitigations

References