Date: Fri, 04 Jun 2021 18:30:28 +0000 From: bugzilla-noreply@freebsd.org To: desktop@FreeBSD.org Subject: [Bug 256405] sysutils/polkit: Update to 0.119 Message-ID: <bug-256405-39348-JmAxKAu3BA@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-256405-39348@https.bugs.freebsd.org/bugzilla/> References: <bug-256405-39348@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256405 --- Comment #3 from commit-hook@FreeBSD.org --- A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/ports/commit/?id=3D0958ffc12c9c0bba44f9a1adc0ca517= 3d7cd8bf9 commit 0958ffc12c9c0bba44f9a1adc0ca5173d7cd8bf9 Author: Tobias C. Berner <tcberner@FreeBSD.org> AuthorDate: 2021-06-04 18:27:49 +0000 Commit: Tobias C. Berner <tcberner@FreeBSD.org> CommitDate: 2021-06-04 18:29:52 +0000 security/vuxml: document vulnerability in sysutils/polkit Cedric Buissart reports: The function `polkit_system_bus_name_get_creds_sync` is used to= get the uid and pid of the process requesting the action. It does this = by sending the unique bus name of the requesting process, which is typically something like ":1.96", to `dbus-daemon`. These unique names are assigned and managed by `dbus-daemon` and cannot be forged,= so this is a good way to check the privileges of the requesting process. The vulnerability happens when the requesting process disconnec= ts from `dbus-daemon` just before the call to `polkit_system_bus_name_get_creds_sync` starts. In this scenari= o, the unique bus name is no longer valid, so `dbus-daemon` sends back= an error reply. This error case is handled in `polkit_system_bus_name_get_creds_sync` by setting the value of= the `error` parameter, but it still returns `TRUE`, rather than `FALSE`. This behavior means that all callers of `polkit_system_bus_name_get_creds_sync` need to carefully check whether an error was set. If the calling function forgets to check for errors then it will think that the uid of the requesting process is 0 (because the `AsyncGetBusNameCredsData` struct is zero initialized). In other words, it will think that the action was requested by a root process, and will therefore allow it. PR: 256405 Security: CVE-2021-3560 polkit security/vuxml/vuln.xml | 47 +++++++++++++++++++++++++++++++++++++++++++++= ++ 1 file changed, 47 insertions(+) --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-256405-39348-JmAxKAu3BA>