Input validation error in Ghostscript

1) Input validation error

EUVDB-ID: #VU33785

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3228

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Integer overflow in the gs_heap_alloc_bytes function in base/gsmalloc.c in Ghostscript 9.15 and earlier allows remote attackers to cause a denial of service (crash) via a crafted Postscript (ps) file, as demonstrated by using the ps2pdf command, which triggers an out-of-bounds read or write.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Ghostscript: 9.00 - 9.15

External links

http://bugs.ghostscript.com/show_bug.cgi?id=696041
http://bugs.ghostscript.com/show_bug.cgi?id=696070
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=0c0b0859
http://openwall.com/lists/oss-security/2015/07/23/14
http://www.debian.org/security/2015/dsa-3326
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.securityfocus.com/bid/76017
http://www.securitytracker.com/id/1033149
http://www.ubuntu.com/usn/USN-2697-1
http://bugzilla.redhat.com/show_bug.cgi?id=1232805
http://security.gentoo.org/glsa/201612-33

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.