CVE-2019-11496

In versions of Couchbase Server prior to 5.0, the bucket named "default" was a special bucket that allowed read and write access without authentication

published September 10, 2019

CVSS
—
EPSS
1%
Percentile
72.4
In the wild
Unconfirmed
What it is

⚠️ If you forgot to secure your Couchbase "default" bucket, attackers could stroll right in and access sensitive data! 📂 Think of the "default" bucket like a restaurant with a back door that nobody checks — if you edit the entrance details, it’s like leaving that door wide open for anyone to sneak in and grab a meal, no questions asked. An attacker can access sensitive data without any authentication, potentially leading to data leaks or unauthorized modifications. This could be absolutely devastating for your application's integrity, as anyone could read or write to the bucket without your knowledge.

Put simply

Think of the "default" bucket like a restaurant with a back door that nobody checks — if you edit the entrance details, it’s like leaving that door wide open for anyone to sneak in and grab a meal, no questions asked. In versions of Couchbase Server prior to 5.0, the bucket named 'default' allowed unauthenticated read/write access if its properties were modified, creating a gaping security hole. While version 5.0 changed the access controls, this vulnerability allows unauthorized access if not properly configured.

What to do

An attacker can access sensitive data without any authentication, potentially leading to data leaks or unauthorized modifications. This could be absolutely devastating for your application's integrity, as anyone could read or write to the bucket without your knowledge. Upgrade to Couchbase Server version 5.1.0 or later to fix this vulnerability. Additionally, ensure that your bucket configurations are properly set to restrict access to authenticated users only. Regularly audit bucket settings to prevent future oversights. You've got this! Follow these steps and secure your Couchbase setup like the security hero you are! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01410 · 72.4th percentile
Published
2019-09-10T17:26Z
EPSS history
Timeline
  • 10 SEP 17:26Z
    In versions of Couchbase Server prior to 5.0, the bucket named "default" was a special bucket that allowed read and write access without authentication
    cvelistv5