Some improperly secured systems do not protect against dictionary-assisted password guessing attacks.
Many systems do not place limits on the number of incorrect login attempts, possibly allowing an attacker to guess passwords or in the case of SNMP, community strings.? Those systems that do not implement a delay between attempts are also subject to rapid brute force attacks from machines.? Although many FTP and telnet servers have implemented delays, some POP3 servers do not.? This could allow attackers to conduct password guessing attacks against an affected system.
The security vulnerability applies to the following combinations of products.
Security Activity Bulletin
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