CVE-2020-22678Public exploit

Crash via out-of-bounds NALU parsing

Published Oct 12, 2021 · Updated Aug 4, 2024

Heap-based buffer overflow in GPAC 0.8.0 allows attackers to crash MP4Box by processing a crafted ISO media file. The gf_media_nalu_remove_emulation_bytes routine reads one byte beyond a one-byte heap allocation while avcc_Read parses an AVC sequence parameter set. Exploitation requires a user to make MP4Box parse the crafted file; the demonstrated consequence is process termination, not code execution.

CVSS severity5.5
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in GPAC 0.8.0 allows attackers to crash MP4Box by processing a crafted ISO media file. The gf_media_nalu_remove_emulation_bytes routine reads one byte beyond a one-byte heap allocation while avcc_Read parses an AVC sequence parameter set. Exploitation requires a user to make MP4Box parse the crafted file; the demonstrated consequence is process termination, not code execution.

The record

CVE
CVE-2020-22678
Published
Oct 12, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 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 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.

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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-787Out-of-bounds Write
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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