cve-2004-0785-01

Summary Local hostname resolution buffer overflow
Date 2004-08-26
CVE Number CVE-2004-0785
Discovered By Sean (infamous42md)
Fixed In Release 0.82

Description

Buffer overflow. If the local computer’s host name is not in /etc/hosts, and the computer performs a DNS query to obtain its hostname when signing on to zephyr, it could receive a reply with a hostname greater than MAXHOSTNAMELEN (generally 64 bytes). If gethostbyname() does not ensure the size of hostent->h_name is less than MAXHOSTNAMELEN, this value would be copied to a buffer that is not large enough.

Mitigation

The calls to copy the hostname were replaced with calls that check the length of the destination buffer.

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