CVE-2020-19720Public exploitNetwork attack vector

Application crash via unchecked media-buffer allocation

Published Jul 13, 2021 · Updated Aug 4, 2024

NULL pointer dereference in Bento4 1.5.1-628 allows context-dependent attackers to crash media-processing applications via a crafted MP4 file. The AP4_IkmsAtom constructor allocates an atom-sized buffer and passes it to AP4_CopyMemory without handling allocation failure, causing a copy through a NULL pointer. Exploitation requires an application using the affected parser to process the supplied file, and the demonstrated consequence is an application crash.

CVSS severity6.5
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Bento4 1.5.1-628 allows context-dependent attackers to crash media-processing applications via a crafted MP4 file. The AP4_IkmsAtom constructor allocates an atom-sized buffer and passes it to AP4_CopyMemory without handling allocation failure, causing a copy through a NULL pointer. Exploitation requires an application using the affected parser to process the supplied file, and the demonstrated consequence is an application crash.

The record

CVE
CVE-2020-19720
Published
Jul 13, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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