Update sane-backends to 1.0.30
epson2: fixes CVE-2020-12867 (GHSL-2020-075) and several memory management issues found while addressing that CVE
epsonds: addresses out-of-bound memory access issues to fix CVE-2020-12862 (GHSL-2020-082) and CVE-2020-12863 (GHSL-2020-083), addresses a buffer overflow fixing CVE-2020-12865 (GHSL-2020-084)
and disables network autodiscovery to mitigate CVE-2020-12866 (GHSL-2020-079), CVE-2020-12861 (GHSL-2020-080) and CVE-2020-12864 (GHSL-2020-081). Note that this backend does not support network
scanners to begin with.
magicolor: fixes a floating point exception and uninitialized data read
fixes an overflow in sanei_tcp_read()