CVE-2017-11171
Published: 11 July 2017
Bad reference counting in the context of accept_ice_connection() in gsm-xsmp-server.c in old versions of gnome-session up until version 2.29.92 allows a local attacker to establish ICE connections to gnome-session with invalid authentication data (an invalid magic cookie). Each failed authentication attempt will leak a file descriptor in gnome-session. When the maximum number of file descriptors is exhausted in the gnome-session process, it will enter an infinite loop trying to communicate without success, consuming 100% of the CPU. The graphical session associated with the gnome-session process will stop working correctly, because communication with gnome-session is no longer possible.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
gnome-session Launchpad, Ubuntu, Debian |
trusty |
Does not exist
(trusty was not-affected)
|
| upstream |
Released
(2.30.0-1)
|
|
| xenial |
Not vulnerable
|
|
| yakkety |
Not vulnerable
|
|
| zesty |
Not vulnerable
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |