Network Audio System · Network Audio System · CVE-2013-4256
**Name of the Vulnerable Software and Affected Versions**
Network Audio System (NAS) version 1.9.3
**Description**
The issue involves multiple stack-based and heap-based buffer overflows that can be exploited by local users to cause a denial of service or possibly execute arbitrary code. This can be achieved through various means, including the display command argument to the `ProcessCommandLine` function, the `ResetHosts` function, several `open` functions in connection.c, the `AUDIOHOST` environment variable to the `CreateWellKnownSockets` or `AmoebaTCPConnectorThread` function, and unspecified vectors related to logging in the `osLogMsg` function. The vulnerability can also be exploited remotely, potentially leading to breaches of confidentiality, integrity, and availability of protected information.
**Recommendations**
For Network Audio System (NAS) version 1.9.3, consider updating to version 1.9.4 or later to resolve the issue.
As a temporary workaround, consider restricting access to the vulnerable functions, such as `ProcessCommandLine`, `ResetHosts`, `open unix socket`, `open isc local`, `open xsight local`, `open att local`, `open att svr4 local`, `CreateWellKnownSockets`, `AmoebaTCPConnectorThread`, and `osLogMsg`, until a patch is available.
Avoid using the `AUDIOHOST` environment variable in the affected functions until the issue is resolved.