Title: NEC Socks5 Host Name Off-By-One Buffer Overflow Vulnerability
Severity: HIGH
Description:
Socks5 is the freely available, open source proxy implementation developed by NEC. It is available for Unix, Linux, and Microsoft operating environments.
A problem with the implementation may make it possible for a remote user to exploit a buffer overflow. The problem is in the handling of host names.
Socks5 handles host names in an unsafe manner. An off-by-one error in the software package may make it possible for users to send host names of 256 bytes and cause memory corruption.
It is unknown whether this issue is a buffer overflow that may be exploited to execute arbitrary code. Exploitation of this vulnerability could minimally result in the crashing of the socks5 process, and denial of service to legitimate users of the service.
In the event that this is an exploitable buffer overflow, this vulnerability could be used to execute code with the privileges of the socks5 process.
Affected Products:
- NEC socks5 1.0.0r10
- NEC socks5 1.0.0r11
- NEC socks5 1.0.0r5
- NEC socks5 1.0.0r6
- NEC socks5 1.0.0r7
- NEC socks5 1.0.0r8
- NEC socks5 1.0.0r9
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