Vulnerability in GNOME Gnome-Session
CVE-2017-11171
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- bugzilla.suse.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- github.com/GNOME/gnome-session/commit/b0dc999e0b45355314616321dbb6cb71e729fc9d (Third Party Advisory)
Frequently asked questions
- What is CVE-2017-11171?
- CVE-2017-11171 is a medium-severity vulnerability in GNOME Gnome-Session, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2017-07-11.
- How severe is CVE-2017-11171?
- Medium severity. CVSS v3 base score is 5.5 out of 10.