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

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* 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

--- Mystic BBS v1.12 A45 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)