In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.

zsh: buffer overflow for very long fds in >& fd syntax zsh: buffer overflow when scanning very long directory paths for symbolic links zsh: NULL dereference in cd in sh compatibility mode under given circumstances zsh: buffer overrun in symlinks zsh: Stack-based buffer overflow in exec.c:hashcmd() zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c zsh: buffer overflow in utils.c:checkmailpath() can lead to local arbitrary code execution zsh: crash on copying empty hash table

Security update for zsh

Affected: Ubuntu:14.04:LTS: zsh, Ubuntu:16.04:LTS: zsh

In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.