[manjaro-security] [arch-security] [ASA-201705-19] fop: xml external entity injection

[Christian Rebischke]

Arch Linux Security Advisory ASA-201705-19
==========================================

Severity: Medium
Date    : 2017-05-21
CVE-ID  : CVE-2017-5661
Package : fop
Type    : xml external entity injection
Remote  : Yes
Link    : https://security.archlinux.org/AVG-254

Summary
=======

The package fop before version 2.2-1 is vulnerable to xml external
entity injection.

Resolution
==========

Upgrade to 2.2-1.

# pacman -Syu "fop>=2.2-1"

The problem has been fixed upstream in version 2.2.

Workaround
==========

None.

Description
===========

Files lying on the filesystem of the server which uses batik 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.

Impact
======

A remote attacker is able to access files lying on the filesystem or
crash the server via sending maliciously crafted SVG files.

References
==========

https://xmlgraphics.apache.org/security.html
https://security.archlinux.org/CVE-2017-5661
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