SECURITY UPDATE: use-after-free in oniguruma onig_new_deluxe()
debian/patches/CVE-2019-13224.patch: reject mismatched encodings
in ext/mbstring/oniguruma/regext.c so onig_new_deluxe() returns
ONIGERR_NOT_SUPPORTED_ENCODING_COMBINATION instead of calling the
buggy conv_encoding() path.
CVE-2019-13224
SECURITY UPDATE: heap buffer over-read in oniguruma str_lower_case_match
debian/patches/CVE-2019-19246.patch: add bounds check (t >= tend)
inside the lowlen loop of str_lower_case_match in
ext/mbstring/oniguruma/regexec.c before dereferencing t.