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