VDB-121968 · CVE-2018-14403 · Nessus 261385

MP4v2 2.0.0 Atom Name mp4util.cpp MP4NameFirstMatches String type conversion

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.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in MP4v2 2.0.0. Affected by this vulnerability is the function MP4NameFirstMatches of the file mp4util.cpp of the component Atom Name Handler. The manipulation as part of String results in type conversion. This vulnerability was named CVE-2018-14403. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in MP4v2 2.0.0. Affected is the function MP4NameFirstMatches of the file mp4util.cpp of the component Atom Name Handler. The manipulation as part of a String leads to a type conversion vulnerability. CWE is classifying the issue as CWE-704. The product does not correctly convert an object, resource, or structure from one type to a different type. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to use of an inappropriate data type for associated atoms. The resulting type confusion can cause out-of-bounds memory access.

The bug was discovered 07/18/2018. The weakness was presented 07/19/2018 (Website). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2018-14403 since 07/18/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 261385 (Linux Distros Unpatched Vulnerability : CVE-2018-14403), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (261385). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

MP4v2

Version

2.0.0

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Type conversion
CWE: CWE-704
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: 261385
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2018-14403

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Upgrade: github.com

Timelineinfo

07/18/2018 🔍
07/18/2018 +0 days 🔍
07/19/2018 +0 days 🔍
07/19/2018 +0 days 🔍
07/19/2018 +0 days 🔍
09/08/2025 +2608 days 🔍

Sourcesinfo

Advisory: FEDORA-2019-1030f4816a
Status: Confirmed

CVE: CVE-2018-14403 (🔍)
GCVE (CVE): GCVE-0-2018-14403
GCVE (VulDB): GCVE-100-121968

Entryinfo

Created: 07/19/2018 19:33
Updated: 09/08/2025 07:47
Changes: 07/19/2018 19:33 (58), 03/08/2020 16:59 (1), 04/18/2023 16:30 (4), 09/08/2025 07:47 (23)
Complete: 🔍
Cache ID: 216:750:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.