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CRITICAL

The c_rehash script allows command injection

Published Jun 21, 2022

Description

In addition to the c_rehash shell command injection identified in CVE-2022-1292, further circumstances where the c_rehash script does not properly sanitise shell metacharacters to prevent command injection were found by code review. When the CVE-2022-1292 was fixed it was not discovered that there are other places in the script where the file names of certificates being hashed were possibly passed to a command executed through the shell. This script is distributed by some operating systems in a manner where it is automatically executed. On such operating systems, an attacker could execute arbitrary commands with the privileges of the script. Use of the c_rehash script is considered obsolete and should be replaced by the OpenSSL rehash command line tool. Fixed in OpenSSL 3.0.4 (Affected 3.0.0,3.0.1,3.0.2,3.0.3). Fixed in OpenSSL 1.1.1p (Affected 1.1.1-1.1.1o). Fixed in OpenSSL 1.0.2zf (Affected 1.0.2-1.0.2ze).

Affected products

Remediation

Red Hat 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 Satellite ships an affected version of the `c_rehash` script embedded in `puppet-agent` package, however, the product is not vulnerable since it does not execute scripts with untrusted data. Moreover, the scriplet is owned by root user and is supposed to be accessed only by administrators. Red Hat updates the OpenSSL compatibility packages (compat-openssl) to only address Important or Critical security issues with backported security patches.

Red Hat 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.

Metrics

Weaknesses (2)

CWE-77

CWE-78

OS Command Injection

References (15)

Change history (3)
  1. CISA ADP
    • SSVC exploitation changed from poc to none
  2. CISA ADP
    • SSVC exploitation changed from none to poc
  3. CISA ADP
    • SSVC exploitation changed from poc to none
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner openssl
Published Jun 21, 2022
Updated Dec 30, 2025
Reserved Jun 13, 2022
Link CVE-2022-2068
CISA Vulnrichment
Updated Apr 23, 2025
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2022-2068
Red Hat
Severity Moderate
Public date Jun 21, 2022
Links CVE-2022-2068 - Bugzilla