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Ubuntu Security Notice USN-4686-1

Ubuntu Security Notice USN-4686-1
Posted Jan 7, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4686-1 - It was discovered that Ghostscript incorrectly handled certain image 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-2018-5727, CVE-2020-27842, CVE-2020-8112
SHA-256 | 0eedf8f4170c8aae566341941ab434d40397be650853f9ac4dc11e8f311c705a

Ubuntu Security Notice USN-4686-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4686-1
January 07, 2021

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

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

- 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 image
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 18.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.18.04.14
libgs9 9.26~dfsg+0-0ubuntu0.18.04.14

Ubuntu 16.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.16.04.14
libgs9 9.26~dfsg+0-0ubuntu0.16.04.14

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

References:
https://usn.ubuntu.com/4686-1
CVE-2018-5727, CVE-2020-27814, CVE-2020-27824, CVE-2020-27841,
CVE-2020-27842, CVE-2020-27843, CVE-2020-27845, CVE-2020-6851,
CVE-2020-8112

Package Information:
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.14
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.16.04.14
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