CVE-2018-16395

An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3

published November 16, 2018

CVSS
—
EPSS
11%
Percentile
95.8
In the wild
Unconfirmed
What it is

⚠️ A surprising twist in OpenSSL could let non-equal objects pass as equal! This bug in Ruby makes it deceptively easy to create illegitimate certificates that could be mistaken for the real thing. 🔥 Think of it like a restaurant that accidentally serves you a dish that looks just like the one you ordered but is actually a cheaper imitation — you might not notice until it’s too late! This vulnerability allows a fake certificate to masquerade as a legitimate one, just like that sneaky dish getting served to an unsuspecting diner. If exploited, this flaw could lead to the acceptance of fraudulent certificates, allowing attackers to sign or encrypt sensitive information as if they were a trusted entity. This could result in data breaches or malicious activities that compromise user security and trust.

Put simply

Think of it like a restaurant that accidentally serves you a dish that looks just like the one you ordered but is actually a cheaper imitation — you might not notice until it’s too late! This vulnerability allows a fake certificate to masquerade as a legitimate one, just like that sneaky dish getting served to an unsuspecting diner. This vulnerability arises because when comparing two OpenSSL::X509::Name objects, the comparison operator '==' may incorrectly return true under specific conditions related to the length and character values, allowing for the creation of illegitimate certificates.

What to do

If exploited, this flaw could lead to the acceptance of fraudulent certificates, allowing attackers to sign or encrypt sensitive information as if they were a trusted entity. This could result in data breaches or malicious activities that compromise user security and trust. To mitigate this vulnerability, ensure your Ruby version is updated to 2.3.8, 2.4.5, 2.5.2, or 2.6.0-preview3 or later. Regularly review and patch your dependencies to stay secure against such issues. 🔒 You've got this! By updating your Ruby installation, you’re taking a strong step toward securing your applications! 🦸

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.10715 · 95.8th percentile
Published
2018-11-16T18:00Z
EPSS history
Timeline
  • 16 NOV 18:00Z
    An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3
    cvelistv5