CVE-2021-3445: High severity IBM QRadar SIEM vulnerability
A flaw was found in libdnf's signature verification functionality in versions before 0.60.1. This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it. The highest risk of this vulnerability is to confidentiality, integrity, as well as system availability.
Other sources
libdnf could allow a remote authenticated attacker to execute arbitrary code on the system, caused by a flaw in signature verification functionality. By placing a signature in the main header, an attacker could exploit this vulnerability to execute arbitrary code on the system.
— IBM
libdnf does its own signature verification, but this can be tricked by placing a signature in the main header. This is exploitable if (and only if) RPM's package verification level is set to "digest" or "none".
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/libdnfto a version that resolves this vulnerability.Fixed in 0.60.1 - Upgrade
Upgrade
libdnfto a version that resolves this vulnerability.Fixed in 0.60.1 - Configuration
Set RPM's package verification level to "digest" or higher (the issue is conditional on it being set to "digest" or "none").
RPM (package verification) package verification level = digest - Configuration
Ensure RPM's package verification level is not set to "none". (The described risk applies if verification level is "digest" or "none".)
RPM (package verification) package verification level = none
Event History
Frequently Asked Questions
What is CVE-2021-3445?
CVE-2021-3445 is a vulnerability in libdnf that could allow a remote authenticated attacker to execute arbitrary code on the system.
What is the severity of CVE-2021-3445?
The severity of CVE-2021-3445 is medium, with a severity value of 6.4.
How can an attacker exploit CVE-2021-3445?
An attacker can exploit CVE-2021-3445 by placing a signature in the main header, which allows them to execute arbitrary code on the system.
How do I fix CVE-2021-3445 for IBM QRadar SIEM 7.5.0 GA?
To fix CVE-2021-3445 for IBM QRadar SIEM 7.5.0 GA, apply the patch provided by IBM. You can download the patch from the IBM Support website.
How do I fix CVE-2021-3445 for IBM QRadar SIEM 7.4.3 GA - 7.4.3 FP4?
To fix CVE-2021-3445 for IBM QRadar SIEM 7.4.3 GA - 7.4.3 FP4, apply the patch provided by IBM. You can download the patch from the IBM Support website.
How do I fix CVE-2021-3445 for IBM QRadar SIEM 7.3.3 GA - 7.3.3 FP10?
To fix CVE-2021-3445 for IBM QRadar SIEM 7.3.3 GA - 7.3.3 FP10, apply the patch provided by IBM. You can download the patch from the IBM Support website.