Privilege escalation in X.org X Server
CVE-2017-13721
In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (27.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- X.org X Server
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
References
- cgit.freedesktop.org/xorg/xserver/commit/ (Third Party Advisory)
- security.gentoo.org/glsa/201710-30 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2017/10/04/10 (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/101238 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-4000 (vendor-advisory, Third Party Advisory)
- lists.x.org/archives/xorg-announce/2017-October/002808.html (Vendor Advisory, mailing-list)
Frequently asked questions
- What is CVE-2017-13721?
- CVE-2017-13721 is a medium-severity vulnerability in X.org X Server, classified under Improper Privilege Management. CVSS score: 4.7/10. Published 2017-10-10.
- How severe is CVE-2017-13721?
- Medium severity. CVSS v3 base score is 4.7 out of 10.