CVE-2016-2179 Denial of service in n/a

What is CVE-2016-2179?

CVE-2016-2179 is a high-severity denial of service vulnerability in Openssl Openssl, published on 16 Sep 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The DTLS implementation in OpenSSL before 1.1.0 does not properly restrict the lifetime of queue entries associated with unused out-of-order messages, which allows remote attackers to cause a denial of service (memory consumption) by maintaining many crafted DTLS sessions simultaneously, related to d1_lib.c, statem_dtls.c, statem_lib.c, and statem_srvr.c.

Weakness: CWE-399

Which versions are affected by CVE-2016-2179?

It affects 2 products.

Products include Openssl Openssl, Oracle Linux.

How do I fix CVE-2016-2179?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2016-2179 being exploited?

There is no known exploitation of CVE-2016-2179 in the wild and no public exploit code.

Other vulnerabilities in Openssl Openssl

• CVE-2009-3245 Null dereference in n/a Critical 10.0
• CVE-2006-3738 Memory corruption in n/a Critical 10.0
• CVE-2026-63073 Untrusted Sender DN Used as Format String in CMP Response Validation Critical 9.8
• CVE-2016-6309 Use after free in n/a Critical 9.8
• CVE-2016-0799 Integer overflow in n/a Critical 9.8

All Openssl Openssl vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2016-2179, DEBIAN-CVE-2016-2179, GHSA-jxqp-p5q4-rm6m, UBUNTU-CVE-2016-2179.