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CVE-2018-14403

MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to...

9.8 Critical

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.91%Up 1.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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.

Record
CVE-2018-14403
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-704
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2018-14403
Updated
2026-11-02
EUVDEUVD-2018-6321 No score

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.

Record
EUVD-2018-6321
Updated
2026-11-03
GitHub AdvisoriesGHSA-cq9c-6m4q-fv48 9.8

MP4NameFirstMatches in mp4util.cpp in MP4v2 2.0.0 mishandles substrings of atom names, leading to...

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.

Record
GHSA-cq9c-6m4q-fv48
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-704
Updated
2026-11-02
OSV 9.8

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.

Record
CVE-2018-14403
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-14403 9.8

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.

Record
UBUNTU-CVE-2018-14403
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2020-0062 No score

Updated libmp4v2 packages fix security vulnerabilities

Updated libmp4v2 packages fix security vulnerabilities:

The libmp4v2 library through version 2.1.0 is vulnerable to an integer underflow when parsing an MP4Atom in mp4atom.cpp. An attacker could exploit this to cause a denial of service via crafted MP4 file (CVE-2018-14325).

The libmp4v2 library through version 2.1.0 is vulnerable to an integer overflow and resultant heap-based buffer overflow when resizing an MP4Array for the ftyp atom in mp4array.h. An attacker could exploit this to cause a denial of service via crafted MP4 file (CVE-2018-14326).

MP4Atom::factory in mp4atom.cpp in MP4v2 2.0.0 incorrectly uses the MP4ItemAtom data type in a certain case where MP4DataAtom is required, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted MP4 file, because access to the data structure has different expectations about layout as a result of this type confusion (CVE-2018-14379).

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 (CVE-2018-14403).

MP4Integer32Property::Read in atom_avcC.cpp in MP4v2 2.1.0 allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted MP4 file (CVE-2018-14446).

Record
MGASA-2020-0062
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libmp4v2
Mageia:7
From an advisory covering 5 CVEs
before 2.1.0-0.4.mga7
2.1.0-0.4.mga7
mp4v2
Ubuntu:16.04:LTS
All versions, plus listed versions
2.0.0~dfsg0-32.0.0~dfsg0-4
None known
mp4v2
Ubuntu:18.04:LTS
All versions, plus listed versions
2.0.0~dfsg0-6
None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-14403 is a critical vulnerability (CVSS 9.8) in Techsmith Mp4v2, published July 19, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.91%, the 87th percentile. No source names a fixed version.

References

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