cve/2020/CVE-2020-12049.md

CVE-2020-12049

Description

An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

POC

Reference

• http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
• http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
• https://gitlab.freedesktop.org/dbus/dbus/-/issues/294
• https://gitlab.freedesktop.org/dbus/dbus/-/issues/294
• https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak
• https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak

Github

• https://github.com/fbreton/lacework
• https://github.com/fokypoky/places-list