Current Description
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.
Source:
MITRE
Description Last Modified:
07/11/2017
View Analysis Description
Analysis Description
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.
Source:
MITRE
Description Last Modified:
07/11/2017
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
5.5 MEDIUM
Vector:
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
(V3 legend)
Impact Score:
3.6
Exploitability Score:
1.8
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High
CVSS v2.0 Severity and Metrics:
Base Score:
4.9 MEDIUM
Vector:
(AV:L/AC:L/Au:N/C:N/I:N/A:C)
(V2 legend)
Impact Subscore:
6.9
Exploitability Subscore:
3.9
Access Vector (AV):
Local
Access Complexity (AC):
Low
Authentication (AU):
None
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
Complete
Additional Information:
Allows disruption of service
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Change History
1 change record found
- show changes
Initial Analysis -
7/26/2017 2:07:52 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:gnome:gnome-session:2.29.92:*:*:*:*:*:*:* (and previous) |
| Added |
CVSS V2 |
|
(AV:L/AC:L/Au:N/C:N/I:N/A:C) |
| Added |
CVSS V3 |
|
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Added |
CWE |
|
CWE-769 |
| Changed |
Reference Type |
https://bugzilla.suse.com/show_bug.cgi?id=1025068 No Types Assigned |
https://bugzilla.suse.com/show_bug.cgi?id=1025068 Issue Tracking, Third Party Advisory |
| Changed |
Reference Type |
https://github.com/GNOME/gnome-session/commit/b0dc999e0b45355314616321dbb6cb71e729fc9d No Types Assigned |
https://github.com/GNOME/gnome-session/commit/b0dc999e0b45355314616321dbb6cb71e729fc9d Third Party Advisory |