CVE-2020-4821 Auth bypass in InfoSphere Change Data Capture for z/OS
Attackers can bypass authentication using an empty password in specific configurations of IBM InfoSphere Data Replication and Change Data Capture.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-4821?
CVE-2020-4821 is a medium-severity authentication bypass vulnerability in IBM InfoSphere Change Data Capture for z/OS, published on 16 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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 authentication mechanisms using an empty password string. IBM X-Force ID: 189834
Weakness: CWE-287
Which versions are affected by CVE-2020-4821?
It affects 2 products.
Products include Ibm Infosphere Change Data Capture, Ibm Infosphere Data Replication.
How do I fix CVE-2020-4821?
No fix has been published for CVE-2020-4821 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-4821 being exploited?
There is no known exploitation of CVE-2020-4821 in the wild and no public exploit code.
Sources
Also known as GHSA-gg8g-78jx-gxgc.