CVE-2019-20433: aspell: UCS-2 and UCS-4 null-terminated string handling OOB read

Severity: Critical

CVSS Score: 9.1

libaspell.a in GNU Aspell before 0.60.8 has a buffer over-read for a string ending with a single '\0' byte, if the encoding is set to ucs-2 or ucs-4 outside of the application, as demonstrated by the ASPELL_CONF environment variable.