Ubuntu Security Notice 3866-3 - USN-3866-2 fixed a regression in Ghostscript. The Ghostscript update introduced a new regression that resulted in certain pages being printed with a blue background. This update fixes the problem. Tavis Ormandy discovered that Ghostscript incorrectly handled certain PostScript files. 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, execute arbitrary code, or cause a denial of service. Various other issues were also addressed.
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Ubuntu Security Notice USN-3866-3
February 26, 2019
ghostscript regression
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
USN-3866-2 introduced a regression in Ghostscript.
Software Description:
- ghostscript: PostScript and PDF interpreter
Details:
USN-3866-2 fixed a regression in Ghostscript. The Ghostscript update
introduced a new regression that resulted in certain pages being printed
with a blue background. This update fixes the problem.
Original advisory details:
Tavis Ormandy discovered that Ghostscript incorrectly handled certain
PostScript files. 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, execute arbitrary code, or cause a
denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.10:
ghostscript 9.26~dfsg+0-0ubuntu0.18.10.7
libgs9 9.26~dfsg+0-0ubuntu0.18.10.7
Ubuntu 18.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.18.04.7
libgs9 9.26~dfsg+0-0ubuntu0.18.04.7
Ubuntu 16.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.16.04.7
libgs9 9.26~dfsg+0-0ubuntu0.16.04.7
Ubuntu 14.04 LTS:
ghostscript 9.26~dfsg+0-0ubuntu0.14.04.7
libgs9 9.26~dfsg+0-0ubuntu0.14.04.7
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3866-3
https://usn.ubuntu.com/usn/usn-3866-1
https://launchpad.net/bugs/1817308
Package Information:
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.10.7
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.7
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.16.04.7
https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.14.04.7