What is CVE-2016-6307?

CVE-2016-6307 is a medium-severity vulnerability in Openssl, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2016-09-26.

How severe is CVE-2016-6307?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2016-6307 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Openssl

CVE-2016-6307

The state-machine implementation in OpenSSL 1.1.0 before 1.1.0a allocates memory before checking for an excessive length, which might allow remote attackers to cause a denial of service (memory consumption) via crafted TLS messages, related to statem/statem.c and statem/statem_lib.c.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.138 (96.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openssl — versions 1.1.0
N/a — versions n/a

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2016-6307?: CVE-2016-6307 is a medium-severity vulnerability in Openssl, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2016-09-26.
How severe is CVE-2016-6307?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2016-6307 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.