openSkat VTMF weak encryption
| openskat-vtmf-weak-encryption (18049) |  Low Risk |
Description:
openSkat uses a weak encryption scheme when generating public keys, caused by a vulnerability in the CheckGroup function in the VTMF implementation. A remote attacker could use this vulnerability to determine the private key.
Consequences:
Obtain Information
Remedy:
Upgrade to the latest version of openSkat (2.1 or later), available from the openSkat Web page. See References.
References:
- openSkat Web page: openSkat.
- BID-11667: OpenSkat Weak Encryption Key Generation Vulnerability
- CVE-2004-2721: The CheckGroup function in openSkat VTMF before 2.1 generates public key pairs in which the p variable might not be prime, which allows remote attackers to determine the private key and decrypt messages.
- OSVDB ID: 11652: openSkat VTMF CheckGroup() Randomization Error Private Key Disclosure
- SECTRACK ID: 1012181: OpenSkat VTMF CheckGroup() Randomization Error May Let Remote Users Determine Private Keys
Platforms Affected:
- openSkat openSkat prior to 2.1
Reported:
Nov 11, 2004
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