polkit -- multiple vulnerabilities

Colin Walters reports:

Integer overflow in the
authentication_agent_new_cookie function in PolicyKit (aka polkit)
before 0.113 allows local users to gain privileges by creating a large
number of connections, which triggers the issuance of a duplicate cookie
value.
The authentication_agent_new function in
polkitbackend/polkitbackendinteractiveauthority.c in PolicyKit (aka
polkit) before 0.113 allows local users to cause a denial of service
(NULL pointer dereference and polkitd daemon crash) by calling
RegisterAuthenticationAgent with an invalid object path.
The polkit_backend_action_pool_init function in
polkitbackend/polkitbackendactionpool.c in PolicyKit (aka polkit) before
0.113 might allow local users to gain privileges via duplicate action
IDs in action descriptions.
PolicyKit (aka polkit) before 0.113 allows local
users to cause a denial of service (memory corruption and polkitd daemon
crash) and possibly gain privileges via unspecified vectors, related to
“javascript rule evaluation.”