Artifex Ghostscript up to 9.26 psi/zdevice2.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Artifex Ghostscript up to 9.26. The impacted element is an unknown function of the file psi/zdevice2.c. This manipulation causes input validation. This vulnerability is tracked as CVE-2019-6116. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Artifex Ghostscript up to 9.26 (Document Processing Software) and classified as critical. Affected by this vulnerability is an unknown functionality of the file psi/zdevice2.c. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In Artifex Ghostscript through 9.26, ephemeral or transient procedures can allow access to system operators, leading to remote code execution.

The bug was discovered 12/03/2018. The weakness was disclosed 03/21/2019 by Tavis Ormandy with Google Project Zero (Website). It is possible to read the advisory at lists.opensuse.org. This vulnerability is known as CVE-2019-6116 since 01/10/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 59 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 121527 (RHEL 7 : ghostscript (RHSA-2019:0229)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237110 (Red Hat Update for ghostscript (RHSA-2019:0229)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (121527) and SecurityFocus (BID 106700†). The entry VDB-135165 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121527
Nessus Name: RHEL 7 : ghostscript (RHSA-2019:0229)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/03/2018 🔍
01/10/2019 +38 days 🔍
01/23/2019 +13 days 🔍
01/31/2019 +8 days 🔍
02/01/2019 +1 days 🔍
03/21/2019 +48 days 🔍
03/22/2019 +1 days 🔍
12/28/2024 +2108 days 🔍

Sourcesinfo

Vendor: artifex.com

Advisory: RHSA-2019:0229
Researcher: Tavis Ormandy
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-6116 (🔍)
GCVE (CVE): GCVE-0-2019-6116
GCVE (VulDB): GCVE-100-132007
SecurityFocus: 106700 - Ghostscript CVE-2019-6116 Remote Code Execution Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/22/2019 08:34
Updated: 12/28/2024 20:58
Changes: 03/22/2019 08:34 (74), 05/18/2020 14:56 (6), 08/04/2023 07:14 (5), 12/28/2024 20:58 (22)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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