Debian Linux Security Advisory 4462-1 - Joe Vennix discovered an authentication bypass vulnerability in dbus, an asynchronous inter-process communication system. The implementation of the DBUS_COOKIE_SHA1 authentication mechanism was susceptible to a symbolic link attack. A local attacker could take advantage of this flaw to bypass authentication and connect to a DBusServer with elevated privileges.
47411081b5ba9236c68f5889f5610ac716223979531628db99760623a5d15f46
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
- -------------------------------------------------------------------------
Debian Security Advisory DSA-4462-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
June 13, 2019 https://www.debian.org/security/faq
- -------------------------------------------------------------------------
Package : dbus
CVE ID : CVE-2019-12749
Debian Bug : 930375
Joe Vennix discovered an authentication bypass vulnerability in dbus, an
asynchronous inter-process communication system. The implementation of
the DBUS_COOKIE_SHA1 authentication mechanism was susceptible to a
symbolic link attack. A local attacker could take advantage of this flaw
to bypass authentication and connect to a DBusServer with elevated
privileges.
The standard system and session dbus-daemons in their default
configuration are not affected by this vulnerability.
The vulnerability was addressed by upgrading dbus to a new upstream
version 1.10.28 which includes additional fixes.
For the stable distribution (stretch), this problem has been fixed in
version 1.10.28-0+deb9u1.
We recommend that you upgrade your dbus packages.
For the detailed security status of dbus please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/dbus
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
-----BEGIN PGP SIGNATURE-----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=2JS9
-----END PGP SIGNATURE-----