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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.270 (98.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.270 · newest: 0.270 · change: 0.000
Affected products
- X.org X Server
- Canonical Ubuntu Linux — versions 16.04, 18.04, 18.10
- Debian Linux — versions 9.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.6
- Red Hat Enterprise Linux Server Eus — versions 7.6
- Red Hat Enterprise Linux Server Tus — versions 7.6
- Red Hat Enterprise Linux Workstation — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/45742/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- lists.x.org/archives/xorg-announce/2018-October/002927.html (Vendor Advisory, mailing-list, Patch, Mitigation)
- www.exploit-db.com/exploits/45922/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- usn.ubuntu.com/3802-1/ (vendor-advisory, Third Party Advisory)
- gitlab.freedesktop.org/xorg/xserver/commit/50c0cf885a6e91c0ea71fb49fa8f1b7c86fe… (Patch, Third Party Advisory)
- www.exploit-db.com/exploits/45697/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- access.redhat.com/errata/RHSA-2018:3410 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/105741 (VDB Entry, Third Party Advisory, vdb-entry)
- www.exploit-db.com/exploits/45908/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.securepatterns.com/2018/10/cve-2018-14665-xorg-x-server.html (Exploit, Third Party Advisory)
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.