zsh-4.3.11-8.AXS4

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.

Security Fix(es):

* zsh: Stack-based buffer overflow in gen_matches_files() at compctl.c (CVE-2018-1083)

* zsh: buffer overflow when scanning very long directory paths for symbolic links (CVE-2014-10072)

* zsh: buffer overrun in symlinks (CVE-2017-18206)

* zsh: buffer overflow in utils.c:checkmailpath() can lead to local arbitrary code execution (CVE-2018-1100)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

The CVE-2018-1083 and CVE-2018-1100 issues were discovered by Richard Maciel Costa (Asianux).

Additional Changes:

For detailed information on changes in this release, see the Asianux Server 4.10 Release Notes and Asianux Server 4.10 Technical Notes linked from the References section.

CVE-2014-10072
In utils.c in zsh before 5.0.6, there is a buffer overflow when scanning very long directory paths for symbolic links.
CVE-2017-18206
In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.
CVE-2018-1083
Zsh before version 5.4.2-test-1 is vulnerable to a buffer overflow in the shell autocomplete functionality. A local unprivileged user can create a specially crafted directory path which leads to code execution in the context of the user who tries to use autocomplete to traverse the before mentioned path. If the user affected is privileged, this leads to privilege escalation.
CVE-2018-1100
zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the utils.c:checkmailpath function. A local attacker could exploit this to execute arbitrary code in the context of another user.