CVE-2019-15699

Name: CVE-2019-15699
Creator: NVD / NIST
Published: 2019-09-24T20:15:11.81+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.65%

Last modified Jun 17, 2026

CVE-2019-15699 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 1.65% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS Probability

1.65%

73.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Suricata-Ids	Suricata	4.1.4

References

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

Timeline

Published: Sep 24, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-15699?

How severe is CVE-2019-15699?

CVE-2019-15699 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.65% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15699?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-15699?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST