Vulnerability in Freedesktop Dbus
CVE-2020-12049
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Freedesktop Dbus
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.freedesktop.org/dbus/dbus/-/issues/294 (Exploit, Third Party Advisory)
- gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16 (Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/06/04/3 (Patch, Mailing List, Third Party Advisory)
- gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18 (Third Party Advisory)
- gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30 (Third Party Advisory)
- usn.ubuntu.com/4398-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4398-2/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202007-46 (vendor-advisory, Third Party Advisory)
- securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Servi…
Frequently asked questions
- What is CVE-2020-12049?
- CVE-2020-12049 is a medium-severity vulnerability in Freedesktop Dbus, classified under Improper Resource Shutdown or Release. CVSS score: 5.5/10. Published 2020-06-08.
- How severe is CVE-2020-12049?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-12049 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.