Auth bypass in X.org X Server
CVE-2018-14665
A flaw was found in xorg-x11-server before 1.20.3. An incorrect permission check for -modulepath and -logfile options when starting Xorg. X server allows unprivileged users with the ability to log in to the system via physical console to escalate their privileges and run arbitrary code under root privileges.
Vulnerability class: Broken Access Control
EPSS: 0.270 (97.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- X.org X_server
- Canonical Ubuntu_linux — versions 16.04, 18.04, 18.10
- Debian Debian_linux — versions 9.0
- Redhat Enterprise_linux_desktop — versions 7.0
- Redhat Enterprise_linux_server — versions 7.0
- Redhat Enterprise_linux_server_aus — versions 7.6
- Redhat Enterprise_linux_server_eus — versions 7.6
- Redhat Enterprise_linux_server_tus — versions 7.6
- Redhat Enterprise_linux_workstation — versions 7.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
- secalert@redhat.com (Vendor Advisory, mailing-list, x_refsource_MLIST, Patch, Mitigation)
- secalert@redhat.com (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- secalert@redhat.com (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- secalert@redhat.com (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
- secalert@redhat.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2018-14665?
- CVE-2018-14665 is a medium-severity vulnerability in X.org X Server, classified under Incorrect Authorization. CVSS score: 6.6/10. Published 2018-10-25.
- How severe is CVE-2018-14665?
- Medium severity. CVSS v3 base score is 6.6 out of 10.
- Is CVE-2018-14665 known to be exploited?
- 40 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.