CVE-2021-3551
Description
A flaw was found in the PKI-server, where the spkispawn command, when run in debug mode, stores admin credentials in the installation log file. This flaw allows a local attacker to retrieve the file to obtain the admin password and gain admin privileges to the Dogtag CA manager. The highest threat from this vulnerability is to confidentiality.
Statement
In Red Hat Identity Management, this flaw affects only new installation made using Red Hat Enterprise Linux 8.4. This issue is considered important in IdM, as its installation is done in Debug mode. The leaked credentials would allow any user with Low privileges to have full control of the managed domain(s).
In Red Hat Certificate System, this flaw affects only new installation of RHCS 10.2, when pkispawn is started in Debug mode. This issue is considered with Low severity as this is not the default, and Certificate System should be isolated from regular users.
Existing installation are not affected.
Mitigation
Manually delete or restrict permission to `other` in the installation log file :
$ rm /var/log/pki/pki-ca-spawn*
- OR, if you need to keep the installation logs :
$ chmod o-rwx /var/log/pki/pki-ca-spawn*
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | 7.8 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
An attacker with access to the system could read sensitive information stored in cleartext (i.e., unencrypted). Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
Acknowledgements
Red Hat would like to thank Christian Heimes for reporting this issue.
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