CVE-2016-6309 is a critical use-after-free vulnerability in OpenSSL 1.1.0a, specifically within the statem/statem.c component. This flaw arises because the software fails to account for memory block relocation after a realloc call, allowing remote attackers to trigger a denial of service or potentially execute arbitrary code through a specially crafted TLS session. With a CVSS score of 9.8 (Critical), it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its high severity and significant media coverage, there is no evidence of active exploitation, and public exploit code (Metasploit, Nuclei, ExploitDB) is currently unavailable.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.1.0aCPE matchmatch criteria | cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.