CVE-2017-18205 2018-02-27T17:29:00.480-05:00 2018-10-31T06:29:11.577-04:00 6.8 NETWORK MEDIUM NONE PARTIAL PARTIAL PARTIAL http://nvd.nist.gov GENTOO GLSA-201805-10 REDHAT RHSA-2018:3073 UBUNTU USN-3593-1 MISC https://sourceforge.net/p/zsh/code/ci/eb783754bdb74377f3cea4ceca9c23a02ea1bf58 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.