Upstream information

CVE-2017-11171 at MITRE

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database SUSE
Base Score 4.9 2.1
Vector AV:L/AC:L/Au:N/C:N/I:N/A:C AV:L/AC:L/Au:N/C:N/I:N/A:P
Access Vector Local Local
Access Complexity Low Low
Authentication None None
Confidentiality Impact None None
Integrity Impact None None
Availability Impact Complete Partial
CVSS v3 Scores
  SUSE
Base Score 4
Vector AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Access Vector Local
Access Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
SUSE Bugzilla entries: 1025068 [RESOLVED / FIXED], 1048274 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Server 11 SP4
  • gnome-session >= 2.28.0-3.11.12.2
  • gnome-session-lang >= 2.28.0-3.11.12.2
Patchnames:
slessp4-gnome-session-13231
SUSE Linux Enterprise Server for SAP Applications 11 SP4
  • gnome-session >= 2.28.0-3.11.12.2
  • gnome-session-lang >= 2.28.0-3.11.12.2
Patchnames:
slessp4-gnome-session-13231


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Desktop 12 SP2 gnome-session Not affected
SUSE Linux Enterprise Server 11 SP3 LTSS gnome-session Affected
SUSE Linux Enterprise Server 11 SP4 gnome-session Released
SUSE Linux Enterprise Server 12 GA LTSS gnome-session Not affected
SUSE Linux Enterprise Server 12 SP1 LTSS gnome-session Not affected
SUSE Linux Enterprise Server 12 SP2 gnome-session Not affected