Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. The -oP option is available to the exim user, and allows a denial of service because root-owned files can be overwritten.
Weakness
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Exim | Exim | 4.00 (including) | 4.94.2 (excluding) |
| Exim4 | Ubuntu | bionic | * |
| Exim4 | Ubuntu | devel | * |
| Exim4 | Ubuntu | esm-infra-legacy/trusty | * |
| Exim4 | Ubuntu | esm-infra-legacy/xenial | * |
| Exim4 | Ubuntu | esm-infra/bionic | * |
| Exim4 | Ubuntu | esm-infra/focal | * |
| Exim4 | Ubuntu | esm-infra/xenial | * |
| Exim4 | Ubuntu | focal | * |
| Exim4 | Ubuntu | groovy | * |
| Exim4 | Ubuntu | hirsute | * |
| Exim4 | Ubuntu | impish | * |
| Exim4 | Ubuntu | jammy | * |
| Exim4 | Ubuntu | trusty | * |
| Exim4 | Ubuntu | trusty/esm | * |
| Exim4 | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/122.html
- https://cwe.mitre.org/data/definitions/233.html
- https://cwe.mitre.org/data/definitions/58.html