CVE-2016-2339 Memory corruption in Ruby

What is CVE-2016-2339?

CVE-2016-2339 is a critical memory corruption vulnerability in Ruby-Lang Ruby, published on 6 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An exploitable heap overflow vulnerability exists in the Fiddle::Function.new "initialize" function functionality of Ruby. In Fiddle::Function.new "initialize" heap buffer "arg_types" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.

Weakness: CWE-119

Which versions are affected by CVE-2016-2339?

It affects 1 product.

Products include Ruby-Lang Ruby.

How do I fix CVE-2016-2339?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2016-2339 being exploited?

There is no known exploitation of CVE-2016-2339 in the wild and no public exploit code.

Other vulnerabilities in Ruby-Lang Ruby

• CVE-2009-4124 Memory corruption in n/a Critical 10.0
• CVE-2022-28738 Use after free in n/a Critical 9.8
• CVE-2011-4121 Weak cryptography in OpenSSL extension of Ruby (Git trunk) Critical 9.8
• CVE-2017-17790 Command injection in n/a Critical 9.8
• CVE-2017-11465 Memory corruption in n/a Critical 9.8

All Ruby-Lang Ruby vulnerabilities

Sources

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

Also known as CLSA-2025-1758023679, GHSA-c4w7-m676-pcvp, SUSE-SU-2017:0914-1, UBUNTU-CVE-2016-2339.