Exposed dangerous method or function in ghostscript (Alpine package)

Published: 2019-04-02

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2019-3835
CWE-ID	CWE-749
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	ghostscript (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Exposed dangerous method or function

EUVDB-ID: #VU18288

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-3835

CWE-ID: CWE-749 - Exposed Dangerous Method or Function

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due presence of superexec operator within the internal dictionary. A remote attacker can create a specially crafted PDF file, trick the victim into opening, bypass system restrictions of the dSAFER sandbox and access files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ghostscript (Alpine package): 9.26-r1

External links

http://git.alpinelinux.org/aports/commit/?id=572bfae1715027763d93986dca4f15179a78f8d6
http://git.alpinelinux.org/aports/commit/?id=ee8b04b44683cef9674d15880a2ff533d01e36b4
http://git.alpinelinux.org/aports/commit/?id=2e62b7ed22984e045c0f6bc445dd7417cc9c8a60
http://git.alpinelinux.org/aports/commit/?id=4a8f0f0a31e8c1197403cd1588368f5418044818
http://git.alpinelinux.org/aports/commit/?id=55c3f713cfda62201a46a0bd1b80c6a11389a10f
http://git.alpinelinux.org/aports/commit/?id=586ad725409e9ccfeace90e127c45c6acbb8daf5
http://git.alpinelinux.org/aports/commit/?id=dc402a92e8e07a157c0179cf2123c1230aca7fd9

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.