stio from 6.5.2 to 6.7.4. This addresses a Grafana security issue,
rated high, that can allow access to internal cluster resources using the Grafana avatar feature.
<a href=https://grafana.com/blog/2020/06/03/grafana-6.7.4-and-7.0.2-released-with-important-security-fix/>(CVE-2020-13379)</a></p></div><nav class=pagenav><div class=left><a title="Istio 1.6.4 security release." href=/v1.25/news/releases/1.6.x/announcing-1.6.4/ class=next-link><svg class="icon left-arrow"><use xlink:href="/v1.25/img/icons.svg#le