Buffer overflow in (1) nlservd and (2) rnavc in Knox Software Arkeia backup product allows local users to obtain root access via a long HOME environmental variable.

Arkiea nlservd allows remote attackers to conduct a denial of service.

Arkeia backup server 4.2.8-2 and earlier creates its database files with world-writable permissions, which could allow local users to overwrite the files or obtain sensitive information.

Knox Arkeia server 4.2, and possibly other versions, installs its root user with a null password by default, which allows local and remote users to gain privileges.

Knox Arkeia server 4.2, and possibly other versions, uses a constant salt when encrypting passwords using the crypt() function, which makes it easier for an attacker to conduct brute force password guessing.

Stack-based buffer overflow in Knox Arkeia Server Backup 5.3.x allows remote attackers to execute arbitrary code via a long type 77 request.

Arkeia Network Backup Client 5.x contains hard-coded credentials that effectively serve as a back door, which allows remote attackers to access the file system and possibly execute arbitrary commands.