The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows remote attackers to cause a denial of service (bad response), or have other unspecified impact by performing a man-in-the-middle attack.
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 |
|---|---|---|---|
| Pykerberos | Apple | - (including) | - (including) |
| Pykerberos | Ubuntu | precise | * |
| Pykerberos | Ubuntu | trusty | * |
| Pykerberos | Ubuntu | upstream | * |
| Pykerberos | Ubuntu | utopic | * |
| Pykerberos | Ubuntu | vivid | * |
| Pykerberos | Ubuntu | wily | * |
| Pykerberos | Ubuntu | yakkety | * |
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://www.openwall.com/lists/oss-security/2015/05/21/3
- http://www.securityfocus.com/bid/74760
- https://bugzilla.redhat.com/show_bug.cgi?id=1223802
- https://github.com/apple/ccs-pykerberos/issues/31
- https://pypi.python.org/pypi/kerberos
- http://www.openwall.com/lists/oss-security/2015/05/21/3
- http://www.securityfocus.com/bid/74760
- https://bugzilla.redhat.com/show_bug.cgi?id=1223802
- https://github.com/apple/ccs-pykerberos/issues/31
- https://pypi.python.org/pypi/kerberos