Buffer overflow in X.org X Server
CVE-2017-13723
In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.3% 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
- www.securityfocus.com/bid/101253 (VDB Entry, Third Party Advisory, vdb-entry)
- cgit.freedesktop.org/xorg/xserver/commit/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2017/11/msg00032.html (mailing-list)
- 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.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-2017-13723?
- CVE-2017-13723 is a high-severity vulnerability in X.org X Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-10-10.
- How severe is CVE-2017-13723?
- High severity. CVSS v3 base score is 7.8 out of 10.