RHSA-2021:4156: Moderate: go-toolset:rhel8 security, bug fix, and enhancement update

Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang. The following packages have been upgraded to a later upstream version: golang (1.16.7). (BZ#1938071)Security Fix(es): golang: net: lookup functions may return invalid host names (CVE-2021-33195) golang: net/http/httputil: ReverseProxy forwards connection headers if first one is empty (CVE-2021-33197) golang: math/big.Rat: may cause a panic or an unrecoverable fatal error if passed inputs with very large exponents (CVE-2021-33198) golang: net/http/httputil: panic due to racy read of persistConn after handler panic (CVE-2021-36221) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Additional Changes:For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.