CVE-2020-36133Network attack vector

Encoder crash via unconverted I422 monochrome input

Published Dec 2, 2021 · Updated Aug 4, 2024

Global buffer overflow in AOM 2.0.1 allows context-dependent attackers to crash an encoder through crafted I422 video input. When color I422 input is encoded as monochrome, aomenc passes the original frame to aom_codec_encode instead of first converting it to I420, triggering an overflow during partition search. Exploitation requires an application or automated system to encode attacker-controlled input with monochrome output enabled; published advisories document service interruption rather than confirmed code execution.

CVSS severity8.8
High
EPSS probability1.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Global buffer overflow in AOM 2.0.1 allows context-dependent attackers to crash an encoder through crafted I422 video input. When color I422 input is encoded as monochrome, aomenc passes the original frame to aom_codec_encode instead of first converting it to I420, triggering an overflow during partition search. Exploitation requires an application or automated system to encode attacker-controlled input with monochrome output enabled; published advisories document service interruption rather than confirmed code execution.

The record

CVE
CVE-2020-36133
Published
Dec 2, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 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

8.8CanonicalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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