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Ubuntu Security Notice USN-4469-1

Ubuntu Security Notice USN-4469-1
Posted Aug 25, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4469-1 - It was discovered that Ghostscript incorrectly handled certain document files. If a user or automated system were tricked into processing a specially crafted file, a remote attacker could use this issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-16287, CVE-2020-16291, CVE-2020-16295, CVE-2020-16299, CVE-2020-16303, CVE-2020-16307, CVE-2020-17538
SHA-256 | a37b8eb29fe3a005bbe5986d84c0a853a8610160315fbe82b2ce46f9d61df2ce

Ubuntu Security Notice USN-4469-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4469-1
August 24, 2020

ghostscript vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Ghostscript.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

It was discovered that Ghostscript incorrectly handled certain document
files. If a user or automated system were tricked into processing a
specially crafted file, a remote attacker could use this issue to cause
Ghostscript to crash, resulting in a denial of service, or possibly
execute arbitrary code.

Update instructions:

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

Ubuntu 20.04 LTS:
ghostscript 9.50~dfsg-5ubuntu4.2
libgs9 9.50~dfsg-5ubuntu4.2

Ubuntu 18.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.18.04.13
libgs9 9.26~dfsg+0-0ubuntu0.18.04.13

Ubuntu 16.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.16.04.13
libgs9 9.26~dfsg+0-0ubuntu0.16.04.13

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

References:
https://usn.ubuntu.com/4469-1
CVE-2020-16287, CVE-2020-16288, CVE-2020-16289, CVE-2020-16290,
CVE-2020-16291, CVE-2020-16292, CVE-2020-16293, CVE-2020-16294,
CVE-2020-16295, CVE-2020-16296, CVE-2020-16297, CVE-2020-16298,
CVE-2020-16299, CVE-2020-16300, CVE-2020-16301, CVE-2020-16302,
CVE-2020-16303, CVE-2020-16304, CVE-2020-16305, CVE-2020-16306,
CVE-2020-16307, CVE-2020-16308, CVE-2020-16309, CVE-2020-16310,
CVE-2020-17538

Package Information:
https://launchpad.net/ubuntu/+source/ghostscript/9.50~dfsg-5ubuntu4.2
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.13
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.16.04.13
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