CVE-2024-49777Public exploitNetwork attack vector

Code execution via unchecked MKV slice size

Published Nov 14, 2024 · Updated Nov 15, 2024

Heap-buffer overflow in tsMuxer nightly-2024-03-14-01-51-12 allows attackers to execute code when a crafted MKV file is processed. MatroskaDemuxer::matroska_parse_block trusts a file-controlled slice_size and passes it with an offset to extractData without checking the remaining buffer. Processing the file is required; the resulting over-read can disclose heap data, crash the process, or support arbitrary code execution.

CVSS severity8.8
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-buffer overflow in tsMuxer nightly-2024-03-14-01-51-12 allows attackers to execute code when a crafted MKV file is processed. MatroskaDemuxer::matroska_parse_block trusts a file-controlled slice_size and passes it with an offset to extractData without checking the remaining buffer. Processing the file is required; the resulting over-read can disclose heap data, crash the process, or support arbitrary code execution.

The record

CVE
CVE-2024-49777
Published
Nov 14, 2024
Updated
Nov 15, 2024
Vendor
justdan96
Product
tsMuxer
Classifications
CWE-120, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=nightly-2024-03-14-01-51-12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

justdan96 · tsMuxerversion=nightly-2024-03-14-01-51-12

Published CVSS scores

8.8CISA-ADPCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1204.002User Execution: Malicious File

Public exploit references

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Technologies

Your stack

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Your stack

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