The package dbus before version 1.8.16-1 is vulnerable to denial of service. . Arch Linux Security Advisory ASA-201502-10 ========================================= Severity: Medium Date : 2015-02-10 CVE-ID : CVE-2015-0245 Package : dbus Type : denial of service Remote : No Link : https://wiki.archlinux.org/title/CVE Summary ====== The package dbus before version 1.8.16-1 is vulnerable to denial of service. Resolution ========= Upgrade to 1.8.16-1. # pacman -Syu "dbus> =1.8.16-1" The problem has been fixed upstream in version 1.8.16. Workaround ========= None. Description ========== Systemd sends back an ActivationFailure D-Bus signal if the activation fails. However, when it receives these signals, dbus-daemon does not verify that the signal actually came from systemd. A malicious local user could send repeated ActivationFailure signals in the hope that it would "win the race" with the genuine signal, causing D-Bus to send back an error to the client that requested activation. Impact ===== A local attacker could send repeated ActivationFailure signals, causing D-Bus to potentially send back an error to the client that requested activation resulting in denial of service. References ========= https://lists.freedesktop.org/archives/dbus/2015-February/016553.html https://www.cve.org/CVERecord?id=CVE-2015-0245 . Arch Linux Security Bulletin ASA-202303-15 addresses a notable moderate risk denial of service vulnerability in dbus. It's advised to upgrade for safety.. Arch Linux, dbus upgrade, denial of service. . Severity: Medium. LinuxSecurity.com Team
The package dbus before version 1.8.10-1 is vulnerable to denial of service via file descriptor exhaustion. . Arch Linux Security Advisory ASA-201411-28 ========================================= Severity: Medium Date : 2014-11-23 CVE-ID : CVE-2014-7824 Package : dbus Type : denial of service Remote : No Link : https://wiki.archlinux.org/title/CVE-2014 Summary ====== The package dbus before version 1.8.10-1 is vulnerable to denial of service via file descriptor exhaustion. Resolution ========= Upgrade to 1.8.10-1. # pacman -Syu "dbus> =1.8.10-1" The problem has been fixed upstream in version 1.8.10. Workaround ========= None. Description ========== The patch issued by the D-Bus maintainers for CVE-2014-3636 was based on incorrect reasoning and does not fully prevent the attack described in the impact section below. Preventing that attack requires raising the system dbus-daemon's RLIMIT_NOFILE (ulimit -n) to a higher value. Impact ===== A local attacker is able to queue up the maximum allowed number of file descriptors to reach the system dbus-daemon's RLIMIT_NOFILE resulting in a denial of service in two ways: - new clients would be unable to connect to the dbus-daemon - when receiving a subsequent message from a non-malicious client that contained a fd, dbus-daemon would receive the MSG_CTRUNC flag, indicating that the list of fds was truncated; kernel fd-passing APIs do not provide any way to recover from that, so dbus-daemon responds to MSG_CTRUNC by disconnecting the sender, causing denial of service to that sender References ========= https://www.cve.org/CVERecord?id=CVE-2014-7824 https://www.openwall.com/lists/oss-security/2014/11/10/2 . The Arch Linux Security Advisory ASA-201401-29 highlights a critical gnome-shell vulnerability that may enable unauthorized access, detailing the flaw and mitigation actions.. Arch Linux, Dbus Security, Denial Of Service Issue. . Severity: Medium. LinuxSecurity.com Team
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