CVE-2019-16278 — Nostromo nhttpd Directory Traversal Vulnerability

Directory Traversal in the function http_verify in nostromo nhttpd through 1.9.6 allows an attacker to achieve remote code execution via a crafted HTTP request.

01What is this vulnerability?

Directory Traversal in the function http_verify in nostromo nhttpd through 1.9.6 allows an attacker to achieve remote code execution via a crafted HTTP request.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2024-11-07. Ransomware use: Unknown.

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

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-10-14T16:06:03.000Z
• Last modified: 2025-10-21T23:45:29.067Z
• Added to CISA KEV: 2024-11-07
• BOD 22-01 due: 2024-11-28

09References

• www.nazgul.ch — http://www.nazgul.ch/dev/nostromo_cl.txt
• sp0re.sh — https://sp0re.sh
• git.sp0re.sh — https://git.sp0re.sh/sp0re/Nhttpd-exploits
• packetstormsecurity.com — http://packetstormsecurity.com/files/155045/Nostromo-1.9.6-Directory-Traversal-R…
• packetstormsecurity.com — http://packetstormsecurity.com/files/155802/nostromo-1.9.6-Remote-Code-Execution…