package/mariadb: security bump to version 10.3.27

package/mariadb: security bump to version 10.3.27

Fixes the following security issues:

- CVE-2020-15180: during SST a joiner sends an sst method name to the donor.
  Donor then appends it to the "wsrep_sst_" string to get the name of the
  sst script to use, e.g.  wsrep_sst_rsync.  There is no validation or
  filtering here, so if the malicious joiner sends, for example, "rsync `rm
  -rf /`" the donor will execute that too.

- CVE-2020-14812: Vulnerability in the MySQL Server product of Oracle MySQL
  (component: Server: Locking).  Supported versions that are affected are
  5.6.49 and prior, 5.7.31 and prior and 8.0.21 and prior.  Easily
  exploitable vulnerability allows high privileged attacker with network
  access via multiple protocols to compromise MySQL Server.  Successful
  attacks of this vulnerability can result in unauthorized ability to cause
  a hang or frequently repeatable crash (complete DOS) of MySQL Server.

- CVE-2020-14765: Vulnerability in the MySQL Server product of Oracle MySQL
  (component: Server: FTS).  Supported versions that are affected are 5.6.49
  and prior, 5.7.31 and prior and 8.0.21 and prior.  Easily exploitable
  vulnerability allows low privileged attacker with network access via
  multiple protocols to compromise MySQL Server.  Successful attacks of this
  vulnerability can result in unauthorized ability to cause a hang or
  frequently repeatable crash (complete DOS) of MySQL Server.

- CVE-2020-14776: Vulnerability in the MySQL Server product of Oracle MySQL
  (component: InnoDB).  Supported versions that are affected are 5.7.31 and
  prior and 8.0.21 and prior.  Easily exploitable vulnerability allows high
  privileged attacker with network access via multiple protocols to
  compromise MySQL Server.  Successful attacks of this vulnerability can
  result in unauthorized ability to cause a hang or frequently repeatable
  crash (complete DOS) of MySQL Server.

- CVE-2020-14789: Vulnerability in the MySQL Server product of Oracle MySQL
  (component: Server: FTS).  Supported versions that are affected are 5.7.31
  and prior and 8.0.21 and prior.  Easily exploitable vulnerability allows
  high privileged attacker with network access via multiple protocols to
  compromise MySQL Server.  Successful attacks of this vulnerability can
  result in unauthorized ability to cause a hang or frequently repeatable
  crash (complete DOS) of MySQL Server.

- CVE-2020-28912:
  https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-bui.pdf
  describes a named pipe privilege vulnerability, specifically for MySQL,
  where an unprivileged user, located on the same machine as the server, can
  act as man-in-the-middle between server and client.

Additionally, 10.3.27 fixes a regression added in 10.3.26.

Drop weak md5/sha1 checksums.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>