CVE-2015-1855 Security feature bypass in Ruby
Remote attackers can spoof servers by bypassing hostname validation in the Ruby OpenSSL extension due to improper wildcard and character handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-1855?
CVE-2015-1855 is a medium-severity vulnerability in Debian Debian Linux, published on 29 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
verify_certificate_identity in the OpenSSL extension in Ruby before 2.0.0 patchlevel 645, 2.1.x before 2.1.6, and 2.2.x before 2.2.2 does not properly validate hostnames, which allows remote attackers to spoof servers via vectors related to (1) multiple wildcards, (1) wildcards in IDNA names, (3) case sensitivity, and (4) non-ASCII characters.
Weakness: CWE-20
Which versions are affected by CVE-2015-1855?
It affects 5 products.
Products include Debian Debian Linux, Puppet Puppet Agent, Puppet Puppet Enterprise, Ruby-Lang Ruby, Ruby-Lang Trunk.
How do I fix CVE-2015-1855?
Upgrade to a fixed version.
Is CVE-2015-1855 being exploited?
There is no known exploitation of CVE-2015-1855 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DLA-224-1, DSA-3245-1, DSA-3246-1, DSA-3247-1, GHSA-4x8v-74xf-h4g3, MGASA-2015-0178 and 1 more.