CVE-2020-4821

IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a user to bypass…

Medium · published July 16, 2021

CVSS v3.0
5.9
EPSS
2%
Percentile
80.6
In the wild
Unconfirmed
What it is

⚠️ An empty password is your ticket in! This vulnerability in IBM InfoSphere Data Replication 11.4 lets users bypass authentication completely. 😱 Think of a front desk in a hotel that lets anyone check in without even asking for a name — that's how this authentication flaw operates. It’s a surprisingly sneaky oversight that could lead to unauthorized access! Without authentication barriers, anyone could gain unauthorized access to sensitive data, which could lead to data breaches, unauthorized changes, or even data loss. This vulnerability poses a significant risk if exploited, especially in environments handling critical or sensitive information.

Put simply

Think of a front desk in a hotel that lets anyone check in without even asking for a name — that's how this authentication flaw operates. It’s a surprisingly sneaky oversight that could lead to unauthorized access! In IBM InfoSphere Data Replication 11.4 and Change Data Capture for z/OS 10.2.1, specific configurations allow an attacker to authenticate using an empty password string, bypassing any security measures in place.

What to do

Without authentication barriers, anyone could gain unauthorized access to sensitive data, which could lead to data breaches, unauthorized changes, or even data loss. This vulnerability poses a significant risk if exploited, especially in environments handling critical or sensitive information. To safeguard against this vulnerability, ensure that your configuration does not permit empty passwords. Review and update your authentication settings to enforce stronger password policies, and regularly check for any updates or patches provided by IBM. You've got this! Follow these steps, and you'll be on your way to securing your system. 🛡️

The record
Technical detail
CVSS v3.0
5.9 · MEDIUM
Vector
CVSS:3.0/AC:H/A:N/C:H/S:U/AV:N/PR:N/UI:N/I:N/RL:O/RC:C/E:U
CVSS v4.0
Not supplied
EPSS
0.02002 · 80.6th percentile
Published
2021-07-16T16:50Z
EPSS history
Timeline
  • 16 JUL 16:50Z
    IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a user to bypass…
    cvelistv5