CVE-2017-17811 — In Netwide Assembler (NASM) 2

In Netwide Assembler (NASM) 2.14rc0, there is a heap-based buffer overflow that will cause a remote denial of service attack, related to a strcpy in paste_tokens in asm/preproc.c, a similar issue to CVE-2017-11111.

01What is this vulnerability?

In Netwide Assembler (NASM) 2.14rc0, there is a heap-based buffer overflow that will cause a remote denial of service attack, related to a strcpy in paste_tokens in asm/preproc.c, a similar issue to CVE-2017-11111.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2017-12-21T03:29:00.240
• Last modified: 2026-05-13T00:24:29.033

09References

• bugzilla.nasm.us — https://bugzilla.nasm.us/show_bug.cgi?id=3392432
• usn.ubuntu.com — https://usn.ubuntu.com/3694-1/
• bugzilla.nasm.us — https://bugzilla.nasm.us/show_bug.cgi?id=3392432
• usn.ubuntu.com — https://usn.ubuntu.com/3694-1/