HOMEVULNERABILITIESCVE-2019-15699
CRITICAL

CVE-2019-15699

CWE-125Published: September 24, 2019· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official Description

An issue was discovered in app-layer-ssl.c in Suricata 4.1.4. Upon receiving a corrupted SSLv3 (TLS 1.2) packet, the parser function TLSDecodeHSHelloExtensions tries to access a memory region that is not allocated, because the expected length of HSHelloExtensions does not match the real length of the HSHelloExtensions part of the packet.

NVD Source

Technical Analysis

CVE-2019-15699 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.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Vendors & Products

suricata-ids1 product(s)
suricata
Source: NVD CPE · 1 total CPE entries

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
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Official Patches & Advisories

ADVISORYhttps://lists.openinfosecfoundation.org/pipermail/oisf-announce/
ADVISORYhttps://suricata-ids.org/2019/09/24/suricata-4-1-5-released/
ADVISORYhttps://lists.openinfosecfoundation.org/pipermail/oisf-announce/
ADVISORYhttps://suricata-ids.org/2019/09/24/suricata-4-1-5-released/

All References (4)

→
https://lists.openinfosecfoundation.org/pipermail/oisf-announce/Third Party Advisory
→
https://suricata-ids.org/2019/09/24/suricata-4-1-5-released/Release Notes · Vendor Advisory
→
https://lists.openinfosecfoundation.org/pipermail/oisf-announce/Third Party Advisory
→
https://suricata-ids.org/2019/09/24/suricata-4-1-5-released/Release Notes · Vendor Advisory

Quick Facts

CVE IDCVE-2019-15699
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedSep 24, 2019

Related CVEs (CWE-125)

CVE-2013-0767
10.0
CVE-2017-14451
10.0
CVE-2021-41556
10.0
CVE-2021-21777
10.0
CVE-2009-2523
10.0
CVE-2026-24826
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-15699 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.
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