CVE-2020-12049

Public Exploit

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.02%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gitlab.freedesktop.org/dbus/dbus/-/issues/294 third party advisory exploit
https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16 third party advisory
http://www.openwall.com/lists/oss-security/2020/06/04/3 mailing list third party advisory patch
https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18 third party advisory
https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30 third party advisory
https://usn.ubuntu.com/4398-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4398-2/ third party advisory vendor advisory
https://security.gentoo.org/glsa/202007-46 third party advisory vendor advisory
https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak third party advisory exploit
http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html

Frequently Asked Questions

What is the severity of CVE-2020-12049?
CVE-2020-12049 has been scored as a medium severity vulnerability.
How to fix CVE-2020-12049?
To fix CVE-2020-12049, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-12049 being actively exploited in the wild?
It is possible that CVE-2020-12049 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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