Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd=… directives.
This issue affects Apache HTTP Server before 2.4.66.
Users are recommended to upgrade to version 2.4.66, which fixes the issue.
Weakness
The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Http_server | Apache | * | 2.4.66 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | httpd-0:2.4.63-4.el10_1.3 | * |
| Red Hat Enterprise Linux 10.0 Extended Update Support | RedHat | httpd-0:2.4.63-1.el10_0.3 | * |
| Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | RedHat | httpd-0:2.2.15-71.el6_10.2 | * |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | RedHat | httpd-0:2.4.6-99.el7_9.7 | * |
| Red Hat Enterprise Linux 8 | RedHat | httpd:2.4-8100020251212173309.489197e6 | * |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | RedHat | httpd:2.4-8020020251223095446.4cda2c84 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | httpd:2.4-8040020251223095736.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | RedHat | httpd:2.4-8040020251223095736.522a0ee4 | * |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | RedHat | httpd:2.4-8060020251223095927.ad008a3a | * |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Service | RedHat | httpd:2.4-8060020251223095927.ad008a3a | * |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | RedHat | httpd:2.4-8060020251223095927.ad008a3a | * |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | RedHat | httpd:2.4-8080020251223093308.63b34585 | * |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | RedHat | httpd:2.4-8080020251223093308.63b34585 | * |
| Red Hat Enterprise Linux 9 | RedHat | httpd-0:2.4.62-7.el9_7.3 | * |
| Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | RedHat | httpd-0:2.4.51-7.el9_0.11 | * |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | RedHat | httpd-0:2.4.53-11.el9_2.14 | * |
| Red Hat Enterprise Linux 9.4 Extended Update Support | RedHat | httpd-0:2.4.57-11.el9_4.4 | * |
| Red Hat Enterprise Linux 9.6 Extended Update Support | RedHat | httpd-0:2.4.62-4.el9_6.5 | * |
| Apache2 | Ubuntu | devel | * |
| Apache2 | Ubuntu | jammy | * |
| Apache2 | Ubuntu | noble | * |
| Apache2 | Ubuntu | plucky | * |
| Apache2 | Ubuntu | questing | * |
| Apache2 | Ubuntu | upstream | * |
Potential Mitigations
- Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/12.html
- https://cwe.mitre.org/data/definitions/217.html
- https://cwe.mitre.org/data/definitions/612.html
- https://cwe.mitre.org/data/definitions/613.html
- https://cwe.mitre.org/data/definitions/618.html
- https://cwe.mitre.org/data/definitions/619.html
- https://cwe.mitre.org/data/definitions/621.html
- https://cwe.mitre.org/data/definitions/622.html
- https://cwe.mitre.org/data/definitions/623.html