CVE-2006-0677

CVE-2006-0677 describes a denial-of-service vulnerability in telnetd within Heimdal versions 0.6.x prior to 0.6.6 and 0.7.x prior to 0.7.2. Remote, unauthenticated attackers can exploit this flaw by sending unknown inputs that trigger a null dereference, leading to a server crash. The vulnerability has a CVSS score of 7.8, indicating high severity due to its network-based attack vector, low attack complexity, and complete availability impact. There is no evidence of active exploitation, no public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage, suggesting it is not a widely targeted or discussed vulnerability.