Heinekingmedia

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. It uses RSA to exchange a secret for symmetric encryption of messages. However, the private RSA key is not only stored on the client but transmitted to the backend, too. Moreover, the key to decrypt the private key is composed of the first 32 bytes of the SHA-512 hash of the user password. But this hash is stored on the backend, too. Therefore, everyone with access to the backend database can read the transmitted secret for symmetric encryption, hence can read the communication.

Published: 2017-08-01T14:00:00.000Z
Updated: 2024-08-05T17:57:58.103Z

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. The logout mechanism does not check for authorization. Therefore, an attacker only needs to know the device ID. This causes a denial of service. This might be interpreted as a vulnerability in customer-controlled software, in the sense that the StashCat client side has no secure way to signal that it is ending a session and that data should be deleted.

Published: 2017-08-01T14:00:00.000Z
Updated: 2024-08-05T17:57:57.939Z

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. To encrypt messages, AES in CBC mode is used with a pseudo-random secret. This secret and the IV are generated with math.random() in previous versions and with CryptoJS.lib.WordArray.random() in newer versions, which uses math.random() internally. This is not cryptographically strong.

Published: 2017-08-01T14:00:00.000Z
Updated: 2024-08-05T17:57:57.673Z

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. For authentication, the user password is hashed directly with SHA-512 without a salt or another key-derivation mechanism to enable a secure secret for authentication. Moreover, only the first 32 bytes of the hash are used. This allows for easy dictionary and rainbow-table attacks if an attacker has access to the password hash.

Published: 2017-08-01T14:00:00.000Z
Updated: 2024-08-05T17:57:57.648Z

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. The product's protocol only tries to ensure confidentiality. In the whole protocol, no integrity or authenticity checks are done. Therefore man-in-the-middle attackers can conduct replay attacks.

Published: 2017-08-01T14:00:00.000Z
Updated: 2024-08-05T17:57:57.640Z