https://bugzilla.redhat.com/show_bug.cgi?id=1549862 https://bugzilla.redhat.com/show_bug.cgi?id=1549861 https://bugzilla.redhat.com/show_bug.cgi?id=1549858 https://bugzilla.redhat.com/show_bug.cgi?id=1549855 https://bugzilla.redhat.com/show_bug.cgi?id=1549841 https://bugzilla.redhat.com/show_bug.cgi?id=1549836 @maintainers: some are fixed in 5.4.2
CVE-2018-7549 (https://nvd.nist.gov/vuln/detail/CVE-2018-7549): 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. CVE-2018-7548 (https://nvd.nist.gov/vuln/detail/CVE-2018-7548): In subst.c in zsh through 5.4.2, there is a NULL pointer dereference when using ${(PA)...} on an empty array result. CVE-2018-1071 (https://nvd.nist.gov/vuln/detail/CVE-2018-1071): zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the exec.c:hashcmd() function. A local attacker could exploit this to cause a denial of service. CVE-2017-18206 (https://nvd.nist.gov/vuln/detail/CVE-2017-18206): In utils.c in zsh before 5.4, symlink expansion had a buffer overflow. CVE-2017-18205 (https://nvd.nist.gov/vuln/detail/CVE-2017-18205): In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a NULL pointer dereference during processing of the cd command with no argument if HOME is not set.
This issue was resolved and addressed in GLSA 201805-10 at https://security.gentoo.org/glsa/201805-10 by GLSA coordinator Christopher Diaz Riveros (chrisadr).
