Artifex Ghostscript up to 9.22 PostScript File 7pk security

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Artifex Ghostscript up to 9.22 and classified as critical. Affected is an unknown function of the component PostScript File Handler. The manipulation leads to 7pk security. This vulnerability is uniquely identified as CVE-2018-15908. Local access is required to approach this attack. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Artifex Ghostscript up to 9.22 (Document Processing Software) and classified as critical. This issue affects an unknown part of the component PostScript File Handler. The manipulation with an unknown input leads to a 7pk security vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In Artifex Ghostscript 9.23 before 2018-08-23, attackers are able to supply malicious PostScript files to bypass .tempfile restrictions and write files.

The bug was discovered 08/24/2018. The weakness was disclosed 08/27/2018 (Website). It is possible to read the advisory at git.ghostscript.com. The identification of this vulnerability is CVE-2018-15908 since 08/27/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117487 (Debian DLA-1504-1 : ghostscript security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237067 (Red Hat Update for ghostscript (RHSA-2018:3650)).

Upgrading to version 9.23 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117487) and SecurityFocus (BID 105178†). The entries VDB-116568, VDB-118612, VDB-123288 and VDB-123289 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Document Processing Software

Vendor

• Artifex

Name

• Ghostscript

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.13
• 9.14
• 9.15
• 9.16
• 9.17
• 9.18
• 9.19
• 9.20
• 9.21
• 9.22

License

• free

Website

• Vendor: https://artifex.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 117487
Nessus Name: Debian DLA-1504-1 : ghostscript security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Ghostscript 9.23
Patch: 0d3901189f245232f0161addf215d7268c4d05a3

Timelineinfo

08/24/2018 🔍
08/27/2018 +2 days 🔍
08/27/2018 +0 days 🔍
08/27/2018 +0 days 🔍
08/28/2018 +1 days 🔍
08/28/2018 +0 days 🔍
09/13/2018 +16 days 🔍
09/14/2018 +1 days 🔍
05/04/2023 +1693 days 🔍

Sourcesinfo

Vendor: artifex.com

Advisory: RHSA-2018:3650
Status: Confirmed

CVE: CVE-2018-15908 (🔍)
GCVE (CVE): GCVE-0-2018-15908
GCVE (VulDB): GCVE-100-123287

OVAL: 🔍

SecurityFocus: 105178 - Ghostscript 'shading_param' Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 08/28/2018 06:35
Updated: 05/04/2023 17:14
Changes: 08/28/2018 06:35 (77), 03/18/2020 15:33 (4), 05/04/2023 17:14 (6)
Complete: 🔍
Cache ID: 216::103

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

Discussion

Want to know what is going to be exploited?

We predict KEV entries!