add-accession-numbers in ctn 3.0.6 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/accession temporary file.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ctn | Erl_wustl | 3.0.6 (including) | 3.0.6 (including) |
| Ctn | Ubuntu | artful | * |
| Ctn | Ubuntu | bionic | * |
| Ctn | Ubuntu | cosmic | * |
| Ctn | Ubuntu | dapper | * |
| Ctn | Ubuntu | devel | * |
| Ctn | Ubuntu | disco | * |
| Ctn | Ubuntu | eoan | * |
| Ctn | Ubuntu | esm-apps/bionic | * |
| Ctn | Ubuntu | esm-apps/focal | * |
| Ctn | Ubuntu | esm-apps/jammy | * |
| Ctn | Ubuntu | esm-apps/noble | * |
| Ctn | Ubuntu | esm-apps/xenial | * |
| Ctn | Ubuntu | focal | * |
| Ctn | Ubuntu | groovy | * |
| Ctn | Ubuntu | gutsy | * |
| Ctn | Ubuntu | hardy | * |
| Ctn | Ubuntu | hirsute | * |
| Ctn | Ubuntu | impish | * |
| Ctn | Ubuntu | intrepid | * |
| Ctn | Ubuntu | jammy | * |
| Ctn | Ubuntu | jaunty | * |
| Ctn | Ubuntu | karmic | * |
| Ctn | Ubuntu | kinetic | * |
| Ctn | Ubuntu | lucid | * |
| Ctn | Ubuntu | lunar | * |
| Ctn | Ubuntu | mantic | * |
| Ctn | Ubuntu | maverick | * |
| Ctn | Ubuntu | natty | * |
| Ctn | Ubuntu | noble | * |
| Ctn | Ubuntu | oneiric | * |
| Ctn | Ubuntu | oracular | * |
| Ctn | Ubuntu | plucky | * |
| Ctn | Ubuntu | precise | * |
| Ctn | Ubuntu | quantal | * |
| Ctn | Ubuntu | questing | * |
| Ctn | Ubuntu | raring | * |
| Ctn | Ubuntu | saucy | * |
| Ctn | Ubuntu | trusty | * |
| Ctn | Ubuntu | utopic | * |
| Ctn | Ubuntu | vivid | * |
| Ctn | Ubuntu | wily | * |
| Ctn | Ubuntu | xenial | * |
| Ctn | Ubuntu | yakkety | * |
| Ctn | Ubuntu | zesty | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html