CVE-2016-2109 Denial of service in n/a
Remote attackers can cause denial of service via memory consumption in OpenSSL's ASN.1 BIO implementation using short invalid encodings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-2109?
CVE-2016-2109 is a high-severity denial of service vulnerability in Openssl Openssl, published on 5 May 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in the ASN.1 BIO implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h allows remote attackers to cause a denial of service (memory consumption) via a short invalid encoding.
Weakness: CWE-399
Which versions are affected by CVE-2016-2109?
It affects 8 products.
Products include Openssl Openssl, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Hpc Node, Redhat Enterprise Linux Hpc Node Eus, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 2 more.
How do I fix CVE-2016-2109?
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-2016-2109 being exploited?
There is no known exploitation of CVE-2016-2109 in the wild and no public exploit code.
Other vulnerabilities in Openssl Openssl
Sources
Also known as ALPINE-CVE-2016-2109, DEBIAN-CVE-2016-2109, GHSA-mq63-fmfx-8qc3, UBUNTU-CVE-2016-2109.