CVE-2023-36243Public exploit

Crash via non-string metadata name handling

Published Jun 22, 2023 · Updated Dec 2, 2024

Invalid memory access in FLVMeta 1.2.1 allows local users to crash the utility by inducing processing of a crafted FLV file. xml_on_metadata_tag_only assumes the metadata event name is an AMF string and passes bytes from a non-string value to strcmp, which reads uninitialized data. Execution requires a user to run FLVMeta on attacker-controlled input; the published proof of concept produces an AddressSanitizer-detected segmentation fault.

CVSS severity7.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid memory access in FLVMeta 1.2.1 allows local users to crash the utility by inducing processing of a crafted FLV file. xml_on_metadata_tag_only assumes the metadata event name is an AMF string and passes bytes from a non-string value to strcmp, which reads uninitialized data. Execution requires a user to run FLVMeta on attacker-controlled input; the published proof of concept produces an AddressSanitizer-detected segmentation fault.

The record

CVE
CVE-2023-36243
Published
Jun 22, 2023
Updated
Dec 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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

7.8NIST NVDCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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