OSV-2021-1502 Heap-buffer-overflow in asn_realloc_rbuild_string

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40431 Crash type: Heap-buffer-overflow READ Crash state: asnreallocrbuildstring snmpv3scopedPDUheaderreallocrbuild snmpv3packetreallocrbuild...