This update for MozillaThunderbird to version 60.5.1 fixes the following issues:

Security issues fixed (MFSA 2019-06 bsc#1125330):

- CVE-2018-18356: Fixed a Use-after-free in Skia.
- CVE-2019-5785: Fixed an Integer overflow in Skia.
- CVE-2018-18335: Fixed a Buffer overflow in Skia by default deactivating Canvas 2D.
This issue does not affect Linuc distributions.
- CVE-2018-18509: Fixed a flaw which during verification of certain S/MIME signatures
showing mistekenly that emails bring a valid sugnature.