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.
6.9	$0-$5k	0.04

A vulnerability classified as critical was found in Artifex MuPDF up to 1.11.x (Document Reader Software). Affected by this vulnerability is some unknown processing of the file pdf/pdf-write.c of the component PDF Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

pdf/pdf-write.c in Artifex MuPDF before 1.12.0 mishandles certain length changes when a repair operation occurs during a clean operation, which allows remote attackers to cause a denial of service (buffer overflow and application crash) or possibly have unspecified other impact via a crafted PDF document.

The bug was discovered 11/08/2017. The weakness was released 12/27/2017 as confirmed git commit (GIT Repository). The advisory is shared at ghostscript.com. This vulnerability is known as CVE-2017-17866 since 12/23/2017. 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 known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 49 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106077 (Fedora 26 : mupdf (2017-d1213cef30)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176524 (Debian Security Update for mupdf (DSA 4334-1)).

Upgrading to version 1.12.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ghostscript.com. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106077). Entries connected to this vulnerability are available at 111873, 112376, 112414 and 118164.

Productinfo

Type

• Document Reader Software

Vendor

• Artifex

Name

• MuPDF

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
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: 106077
Nessus Name: Fedora 26 : mupdf (2017-d1213cef30)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 864785
OpenVAS Name: Fedora Update for mupdf FEDORA-2017-4c30d86843
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: MuPDF 1.12.0
Patch: ghostscript.com

Timelineinfo

11/08/2017 🔍
12/23/2017 +45 days 🔍
12/27/2017 +4 days 🔍
12/27/2017 +0 days 🔍
12/28/2017 +1 days 🔍
01/16/2018 +19 days 🔍
01/17/2018 +1 days 🔍
01/24/2018 +7 days 🔍
01/19/2023 +1821 days 🔍

Sourcesinfo

Vendor: artifex.com

Advisory: FEDORA-2017-d1213cef30
Researcher: Young_X
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-17866 (🔍)
OVAL: 🔍

SecurityFocus: 102823 - Artifex MuPDF CVE-2018-6187 Heap Based Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 12/28/2017 09:42
Updated: 01/19/2023 09:19
Changes: 12/28/2017 09:42 (80), 12/18/2019 09:13 (6), 01/28/2021 09:09 (2), 01/19/2023 09:19 (3)
Complete: 🔍

Discussion

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