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Ubuntu Security Notice USN-4092-1

Ubuntu Security Notice USN-4092-1
Posted Aug 12, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4092-1 - Netanel Fisher discovered that the font handler in Ghostscript did not properly restrict privileged calls when '-dSAFER' restrictions were in effect. If a user or automated system were tricked into processing a specially crafted file, a remote attacker could possibly use this issue to access arbitrary files.

tags | advisory, remote, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-10216
MD5 | 93fbf75964eabb644543aff00d8e4d38

Ubuntu Security Notice USN-4092-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4092-1
August 12, 2019

ghostscript vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Ghostscript could be made to access files if it opened a specially
crafted file.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

Netanel Fisher discovered that the font handler in Ghostscript did not
properly restrict privileged calls when '-dSAFER' restrictions were in
effect. If a user or automated system were tricked into processing a
specially crafted file, a remote attacker could possibly use this issue to
access arbitrary files.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 19.04:
ghostscript 9.26~dfsg+0-0ubuntu7.2
libgs9 9.26~dfsg+0-0ubuntu7.2

Ubuntu 18.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.18.04.10
libgs9 9.26~dfsg+0-0ubuntu0.18.04.10

Ubuntu 16.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.16.04.10
libgs9 9.26~dfsg+0-0ubuntu0.16.04.10

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4092-1
CVE-2019-10216

Package Information:
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu7.2
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.10
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.16.04.10

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