CLSA-2023-1697482739 exim: Fix of 2 CVEs

CVE-2023-42114: fix possible OOB read in SPA authenticator - CVE-2023-42116: fix possible OOB write in SPA authenticator...

CLSA-2023-1697463600 Fix CVE(s): CVE-2023-42116, CVE-2023-42114

SECURITY UPDATE: Multiple security issues - debian/patches/CVE-2023-42114.patch: fix possible OOB read in SPA authenticator - CVE-2023-42114 - debian/patches/CVE-2023-42116.patch: fix possible OOB write in SPA authenticator - CVE-2023-42116...