MEDIUM
CVE-2019-17420
CWE-459Published: October 10, 2019· Updated: Jun 17, 2026
5.3
CVSS v3.1
Official Description
In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP protocol parsing error causes the http_header signature to not alert on a response with a single \r\n ending.
Technical Analysis
CVE-2019-17420 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
https://github.com/OISF/libhtp/pull/213Patch · Third Party Advisory
→
https://redmine.openinfosecfoundation.org/issues/2969Issue Tracking · Vendor Advisory
→
https://github.com/OISF/libhtp/pull/213Patch · Third Party Advisory
→
https://redmine.openinfosecfoundation.org/issues/2969Issue Tracking · Vendor Advisory
Quick Facts
CVE IDCVE-2019-17420
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-459
CISA KEVNo
Affected2 vendor(s)
PublishedOct 10, 2019
Related CVEs (CWE-459)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-17420 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.