(1) core/tests/test_memmap.py, (2) core/tests/test_multiarray.py, (3) f2py/f2py2e.py, and (4) lib/tests/test_io.py in NumPy before 1.8.1 allow local users to write to arbitrary files via a symlink attack on a 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 |
|---|---|---|---|
| Numpy | Numpy | * | 1.8.0 (including) |
| Numpy | Numpy | 1.8.1-rc1 (including) | 1.8.1-rc1 (including) |
| Python-numpy | Ubuntu | artful | * |
| Python-numpy | Ubuntu | lucid | * |
| Python-numpy | Ubuntu | precise | * |
| Python-numpy | Ubuntu | quantal | * |
| Python-numpy | Ubuntu | saucy | * |
| Python-numpy | Ubuntu | trusty | * |
| Python-numpy | Ubuntu | upstream | * |
| Python-numpy | Ubuntu | utopic | * |
| Python-numpy | Ubuntu | vivid | * |
| Python-numpy | Ubuntu | wily | * |
| Python-numpy | Ubuntu | yakkety | * |
| Python-numpy | 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
References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128358.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128781.html
- http://www.openwall.com/lists/oss-security/2014/02/08/3
- http://www.securityfocus.com/bid/65440
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=737778
- https://bugzilla.redhat.com/show_bug.cgi?id=1062009
- https://exchange.xforce.ibmcloud.com/vulnerabilities/91317
- https://github.com/numpy/numpy/blob/maintenance/1.8.x/doc/release/1.8.1-notes.rst
- https://github.com/numpy/numpy/commit/0bb46c1448b0d3f5453d5182a17ea7ac5854ee15
- https://github.com/numpy/numpy/pull/4262
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128358.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128781.html
- http://www.openwall.com/lists/oss-security/2014/02/08/3
- http://www.securityfocus.com/bid/65440
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=737778
- https://bugzilla.redhat.com/show_bug.cgi?id=1062009
- https://exchange.xforce.ibmcloud.com/vulnerabilities/91317
- https://github.com/numpy/numpy/blob/maintenance/1.8.x/doc/release/1.8.1-notes.rst
- https://github.com/numpy/numpy/commit/0bb46c1448b0d3f5453d5182a17ea7ac5854ee15
- https://github.com/numpy/numpy/pull/4262