From upstreams changelog [1]:
dbus 1.12.20 (2020-07-02)
=========================
The “temporary nemesis” release.
Maybe security fixes:
• On Unix, avoid a use-after-free if two usernames have the same
numeric uid. In older versions this could lead to a crash (denial of
service) or other undefined behaviour, possibly including incorrect
authorization decisions if <policy group=...> is used.
Like Unix filesystems, D-Bus' model of identity cannot distinguish
between users of different names with the same numeric uid, so this
configuration is not advisable on systems where D-Bus will be used.
Thanks to Daniel Onaca.
(dbus#305, dbus!166; Simon McVittie)
Other fixes:
• On Solaris and its derivatives, if a cmsg header is truncated, ensure
that we do not overrun the buffer used for fd-passing, even if the
kernel tells us to.
(dbus#304, dbus!165; Andy Fiddaman)
[1] https://gitlab.freedesktop.org/dbus/dbus/blob/dbus-1.12/NEWS
PR: 247730
Exp-run by: antoine
MFH: 2020Q3
9e2d3bcf0c