Security restrictions bypass in ghostscript (Alpine package)

1) Security restrictions bypass

EUVDB-ID: #VU16071

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-19475

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists due to the psi/zdevice2.c source code file fails to check available stack space. A remote unauthenticated attacker can trick the victim into accessing a PostScript file that submits malicious input to bypass the security access restrictions on the targeted system, which could be used to conduct further attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ghostscript (Alpine package): 9.04-r0 - 9.25-r1

ghostscript (Alpine package):

External links

http://git.alpinelinux.org/aports/commit/?id=8a3efd9a5b28fc17dc6dd75b46cac43cfd1b21bc
http://git.alpinelinux.org/aports/commit/?id=9096cb46474180811d360209f21d51206ce31580
http://git.alpinelinux.org/aports/commit/?id=b1c96f0abd38a7ca7a038f9b86dc0534d9d7d3bd
http://git.alpinelinux.org/aports/commit/?id=b0243d03648d68851d3b5edb68da29eaae5c9f0f
http://git.alpinelinux.org/aports/commit/?id=b38a11ee1f5109ffc2f67afa52903b9437dd4111
http://git.alpinelinux.org/aports/commit/?id=1effb87543c10d5de5e0a181c6757a0d5cf9e599
http://git.alpinelinux.org/aports/commit/?id=90f284afbeec1f422dc08dc966719005e5def79a
http://git.alpinelinux.org/aports/commit/?id=e558a52ec2ce576ebfe50d2acaee3449d1ef6c26

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.