VDB-123691 · CVE-2018-16648 · Nessus 120623

Artifex MuPDF 1.13.0 fitz/buffer.c fz_append_byte PDF File array index

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Artifex MuPDF 1.13.0. The impacted element is the function fz_append_byte of the file fitz/buffer.c. This manipulation as part of PDF File causes array index. This vulnerability is handled as CVE-2018-16648. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Artifex MuPDF 1.13.0 (Document Reader Software) and classified as problematic. Affected by this vulnerability is the function fz_append_byte of the file fitz/buffer.c. The manipulation as part of a PDF File leads to a array index vulnerability. The CWE definition for the vulnerability is CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. As an impact it is known to affect availability. The summary by CVE is:

In Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c pdf_dev_alpha array-index underflow.

The bug was discovered 09/07/2018. The weakness was released 09/06/2018 (Website). It is possible to read the advisory at bugs.ghostscript.com. This vulnerability is known as CVE-2018-16648 since 09/06/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 120623 (Fedora 29 : mupdf (2018-93558de1ac)), 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.

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (120623). Entries connected to this vulnerability are available at VDB-123690 and VDB-126005. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Document Reader Software

Vendor

Artifex

Name

MuPDF

Version

1.13.0

License

commercial

Website

Vendor: https://artifex.com/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Array index
CWE: CWE-129 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 120623
Nessus Name: Fedora 29 : mupdf (2018-93558de1ac)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

09/06/2018 🔍
09/06/2018 +0 days 🔍
09/06/2018 +0 days 🔍
09/07/2018 +1 days 🔍
09/07/2018 +0 days 🔍
11/17/2018 +71 days 🔍
01/03/2019 +47 days 🔍
09/12/2024 +2079 days 🔍