telnet-bsd: Multiple buffer overflows1. Gentoo Linux Security Advisory
Related bugreports: #87019 The telnet-bsd telnet client is vulnerable to two buffer overflows, which could allow a malicious telnet server operator to execute arbitrary code. telnet-bsd provides a command line telnet client which is used for remote login using the telnet protocol. A buffer overflow has been identified in the env_opt_add() function of telnet-bsd, where a response requiring excessive escaping can cause a heap-based buffer overflow. Another issue has been identified in the slc_add_reply() function, where a large number of SLC commands can overflow a fixed size buffer. Successful exploitation would require a vulnerable user to connect to an attacker-controlled host using telnet, potentially executing arbitrary code with the permissions of the telnet user. There is no known workaround at this time. All telnet-bsd users should upgrade to the latest version:
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