Fedora 28 Zsh Advisory: Critical Buffer Overflows Fixed

The zsh shell is a command interpreter usable as an interactive login

shell and as a shell script command processor. Zsh resembles the ksh

shell (the Korn shell), but includes many enhancements. Zsh supports

command line editing, built-in spelling correction, programmable

command completion, shell functions (with autoloading), a history

mechanism, and more.

update to latest upstream release, which fixes the following vulnerabilities: -CVE-2018-1100 - stack-based buffer overflow in utils.c:checkmailpath() -CVE-2018-1083 - stack-based buffer overflow in compctl.c:gen_matches_files() -CVE-2018-1071 - stack-based buffer overflow in exec.c:hashcmd()

[ 1 ] Bug #1564936 - zsh-5.5 is available

https://bugzilla.redhat.com/show_bug.cgi?id=1564936

[ 2 ] Bug #1560696 - CVE-2018-1083 zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1560696

[ 3 ] Bug #1553533 - CVE-2018-1071 zsh: Stack-based buffer overflow in exec.c:hashcmd() [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1553533

[ 4 ] Bug #1563396 - CVE-2018-1100 zsh: buffer overflow in utils.c:checkmailpath() can lead to local arbitrary code execution [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1563396

su -c 'dnf upgrade zsh' at the command line.

For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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