Related Vulnerabilities: CVE-2022-2068  

A flaw was found in OpenSSL. The issue in CVE-2022-1292 did not find other places in the `c_rehash` script where it possibly passed the file names of certificates being hashed to a command executed through the shell. Some operating systems distribute this script in a manner where it is automatically executed. On these operating systems, this flaw allows an attacker to execute arbitrary commands with the privileges of the script.

Description

A flaw was found in OpenSSL. The issue in CVE-2022-1292 did not find other places in the `c_rehash` script where it possibly passed the file names of certificates being hashed to a command executed through the shell. Some operating systems distribute this script in a manner where it is automatically executed. On these operating systems, this flaw allows an attacker to execute arbitrary commands with the privileges of the script.

Statement

Red Hat Enterprise Linux uses a system-wide store of trusted certificates bundled in a single file and updated via `update-ca-trust`. The `c_rehash` script is not included in the default installation on any supported RHEL version and is never executed automatically. For these reasons, this flaw has been rated as having a security impact of Moderate. Red Hat Enterprise Linux 7 provides a vulnerable version of the `c_rehash` script in the `openssl-perl` package, available only through the unsupported Optional repository. As the Optional repository is not supported and Red Hat Enterprise Linux 7 is in Maintenance Support 2 Phase, this issue is not planned to be addressed there. Red Hat updates the OpenSSL compatibility packages (compat-openssl) to only address Important or Critical security issues with backported security patches.

Red Hat Enterprise Linux uses a system-wide store of trusted certificates bundled in a single file and updated via update-ca-trust. The c_rehash script is not included in the default installation on any supported RHEL version and is never executed automatically. For these reasons, this flaw has been rated as having a security impact of Moderate.

Red Hat Enterprise Linux 7 provides a vulnerable version of the c_rehash script in the openssl-perl package, available only through the unsupported Optional repository. As the Optional repository is not supported and Red Hat Enterprise Linux 7 is in Maintenance Support 2 Phase, this issue is not planned to be addressed there.

Red Hat updates the OpenSSL compatibility packages (compat-openssl) to only address Important or Critical security issues with backported security patches.

Mitigation

As mentioned in the upstream security advisory, use of the c_rehash script is considered obsolete and should be replaced by the OpenSSL rehash command-line tool.

Additional Information

  • Bugzilla 2097310: CVE-2022-2068 openssl: the c_rehash script allows command injection
  • CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
  • FAQ: Frequently asked questions about CVE-2022-2068