CVE-2012-4750Public exploitNetwork attack vector

Remote code execution via AMF memcpy heap corruption

Published Jan 13, 2020 · Updated Aug 6, 2024

Code execution in EzServer 7.0 allows remote attackers to execute arbitrary code or cause a denial of service via crafted AMF requests. The RTMP AMF parser takes a size value from the request and passes it unchecked to memcpy, copying beyond the supplied buffer and corrupting heap memory. A completed RTMP handshake is required, but no authentication is needed; malformed requests reliably crash the service, while code execution remains a possible consequence.

CVSS severity9.8
Critical
EPSS probability8.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in EzServer 7.0 allows remote attackers to execute arbitrary code or cause a denial of service via crafted AMF requests. The RTMP AMF parser takes a size value from the request and passes it unchecked to memcpy, copying beyond the supplied buffer and corrupting heap memory. A completed RTMP handshake is required, but no authentication is needed; malformed requests reliably crash the service, while code execution remains a possible consequence.

The record

CVE
CVE-2012-4750
Published
Jan 13, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3Bugtraq disclosureAV:N/AC:M/Au:N/C:C/I:C/A:C

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

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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