Artifex Ghostscript up to 9.20 psi/zfile.c -dSAFER information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Artifex Ghostscript up to 9.20 and classified as problematic. Affected is an unknown function of the file psi/zfile.c. Executing a manipulation of the argument -dSAFER can lead to information disclosure. This vulnerability is tracked as CVE-2018-11645. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Artifex Ghostscript up to 9.20 (Document Processing Software). This vulnerability affects an unknown code of the file psi/zfile.c. The manipulation of the argument -dSAFER with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

psi/zfile.c in Artifex Ghostscript before 9.21rc1 permits the status command even if -dSAFER is used, which might allow remote attackers to determine the existence and size of arbitrary files, a similar issue to CVE-2016-7977.

The bug was discovered 10/08/2016. The weakness was disclosed 06/01/2018 (Website). The advisory is shared for download at git.ghostscript.com. This vulnerability was named CVE-2018-11645 since 06/01/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 601 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 176526 (Debian Security Update for ghostscript (DSA 4336-1)).

Upgrading to version 9.21rc1 eliminates this vulnerability. A possible mitigation has been published 4 months 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-123287, VDB-123288 and VDB-123289 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

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

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Ghostscript 9.21rc1
Patch: b60d50b7567369ad856cebe1efb6cd7dd2284219

Timelineinfo

10/08/2016 🔍
06/01/2018 +600 days 🔍
06/01/2018 +0 days 🔍
06/01/2018 +0 days 🔍
06/02/2018 +1 days 🔍
08/28/2018 +87 days 🔍
09/13/2018 +16 days 🔍
09/14/2018 +1 days 🔍
03/19/2023 +1647 days 🔍

Sourcesinfo

Vendor: artifex.com

Advisory: RHSA-2019:2281
Status: Confirmed

CVE: CVE-2018-11645 (🔍)
GCVE (CVE): GCVE-0-2018-11645
GCVE (VulDB): GCVE-100-118612

OVAL: 🔍

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

See also: 🔍

Entryinfo

Created: 06/02/2018 10:31
Updated: 03/19/2023 12:37
Changes: 06/02/2018 10:31 (77), 02/11/2020 17:24 (5), 03/19/2023 12:37 (6)
Complete: 🔍
Cache ID: 216::103

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