CVE-2019-20628Public exploit

Process crash via unchecked PMT descriptor lengths

Published Mar 24, 2020 · Updated Aug 5, 2024

Use-after-free in libgpac.a in GPAC before 0.8.0 allows local users to crash MP4Box by supplying a crafted MP4 file. In gf_m2ts_process_pmt, MPEG-4 IOD descriptor parsing trusts PMT length fields and writes through a buffer pointer that gf_m2ts_gather_section freed during reallocation. The victim must invoke MP4Box to inspect the file; the demonstrated result is a process crash, with no reported confidentiality or integrity impact.

CVSS severity5.5
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

Use-after-free in libgpac.a in GPAC before 0.8.0 allows local users to crash MP4Box by supplying a crafted MP4 file. In gf_m2ts_process_pmt, MPEG-4 IOD descriptor parsing trusts PMT length fields and writes through a buffer pointer that gf_m2ts_gather_section freed during reallocation. The victim must invoke MP4Box to inspect the file; the demonstrated result is a process crash, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2019-20628
Published
Mar 24, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 vectorlocal
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
5.5NIST NVDCVSS:3.1/AV:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation
T1204.002Malicious File

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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