VulnerabilityModified
CVE-2020-12049
The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit.
MEDIUM 5.5EPSS 0.57%
Does this matter?
Lower severity and a low EPSS score (0.57%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.57% probability · 45th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-404
- Affected
- freedesktop/dbus · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
- http://www.openwall.com/lists/oss-security/2020/06/04/3Mailing List, Patch, Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/issues/294Exploit, Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16Third Party Advisory
- https://security.gentoo.org/glsa/202007-46Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leakExploit, Third Party Advisory
- https://usn.ubuntu.com/4398-1/Third Party Advisory
- https://usn.ubuntu.com/4398-2/Third Party Advisory
- http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
- http://www.openwall.com/lists/oss-security/2020/06/04/3Mailing List, Patch, Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/issues/294Exploit, Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18Third Party Advisory
- https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16Third Party Advisory
- https://security.gentoo.org/glsa/202007-46Third Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leakExploit, Third Party Advisory
- https://usn.ubuntu.com/4398-1/Third Party Advisory
- https://usn.ubuntu.com/4398-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.