An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. The backup tape controller (butc) process accepts incoming RPCs but does not require (or allow for) authentication of those RPCs. Handling those RPCs results in operations being performed with administrator credentials, including dumping/restoring volume contents and manipulating the backup database. For example, an unauthenticated attacker can replace any volumes content with arbitrary data.
Weakness
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openafs | Openafs | * | 1.6.23 (excluding) |
| Openafs | Openafs | 1.8.0 (including) | 1.8.2 (excluding) |
| Openafs | Ubuntu | bionic | * |
| Openafs | Ubuntu | cosmic | * |
| Openafs | Ubuntu | esm-apps/bionic | * |
| Openafs | Ubuntu | esm-apps/xenial | * |
| Openafs | Ubuntu | trusty | * |
| Openafs | Ubuntu | upstream | * |
| Openafs | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/114.html
- https://cwe.mitre.org/data/definitions/115.html
- https://cwe.mitre.org/data/definitions/151.html
- https://cwe.mitre.org/data/definitions/194.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/593.html
- https://cwe.mitre.org/data/definitions/633.html
- https://cwe.mitre.org/data/definitions/650.html
- https://cwe.mitre.org/data/definitions/94.html
References
- http://openafs.org/pages/security/OPENAFS-SA-2018-001.txt
- https://lists.debian.org/debian-lts-announce/2018/09/msg00024.html
- https://www.debian.org/security/2018/dsa-4302
- http://openafs.org/pages/security/OPENAFS-SA-2018-001.txt
- https://lists.debian.org/debian-lts-announce/2018/09/msg00024.html
- https://www.debian.org/security/2018/dsa-4302