Artifex Ghostscript up to 9.23 access control

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability was found in Artifex Ghostscript up to 9.23 (Document Processing Software). It has been declared as critical. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Artifex Ghostscript before 9.24. Incorrect "restoration of privilege" checking during handling of /invalidaccess exceptions could be used by attackers able to supply crafted PostScript to execute code using the "pipe" instruction.

The bug was discovered 08/24/2018. The weakness was published 09/05/2018 by Tavis Ormandy (Website). It is possible to read the advisory at git.ghostscript.com. This vulnerability is known as CVE-2018-16509 since 09/04/2018. 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 are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is possible to download the exploit at exploit-db.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 12 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 256499 (CentOS Security Update for ghostscript (CESA-2018:2918)).

Upgrading to version 9.24 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117487) and Exploit-DB (45369). Similar entries are available at 116568, 118612, 123287 and 123288.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ghostscript_failed_restore.rb
MetaSploit Name: Ghostscript Failed Restore Command Execution
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Ghostscript 9.24
Patch: 520bb0ea7519aa3e79db78aaf0589dae02103764

Timelineinfo

08/21/2018 🔍
08/24/2018 +3 days 🔍
09/04/2018 +10 days 🔍
09/05/2018 +1 days 🔍
09/05/2018 +0 days 🔍
09/05/2018 +0 days 🔍
09/13/2018 +8 days 🔍
09/14/2018 +1 days 🔍
05/07/2023 +1696 days 🔍

Sourcesinfo

Vendor: artifex.com

Advisory: RHSA-2018:2918
Researcher: Tavis Ormandy
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-16509 (🔍)
OVAL: 🔍

SecurityFocus: 105122 - Ghostscript Multiple Security Bypass Vulnerabilities

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

Entryinfo

Created: 09/05/2018 14:38
Updated: 05/07/2023 09:04
Changes: 09/05/2018 14:38 (80), 03/20/2020 16:51 (9), 05/07/2023 09:04 (6)
Complete: 🔍

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