[Ftp-release] Announcing dbus 1.12.20 security update
smcv at collabora.com
Thu Jul 2 19:39:00 UTC 2020
dbus is the reference implementation of D-Bus, a message bus for
communication between applications and system services.
This is a stable-branch release, including a fix that addresses
a security vulnerability (on systems that are arguably misconfigured).
Upgrading is recommended.
git tag: dbus-1.12.20
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)
• 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)
Simon McVittie, Collabora Ltd. / Debian
on behalf of the dbus maintainers
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