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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.44% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- x.org/x server · debian/debian linux
- Source
- cve@mitre.org
References
- http://www.debian.org/security/2017/dsa-4000Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/10/04/10Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/101253Third Party Advisory, VDB Entry
- https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76acThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html
- https://lists.x.org/archives/xorg-announce/2017-October/002808.htmlVendor Advisory
- https://security.gentoo.org/glsa/201710-30Third Party Advisory
- http://www.debian.org/security/2017/dsa-4000Third Party Advisory
- http://www.openwall.com/lists/oss-security/2017/10/04/10Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/101253Third Party Advisory, VDB Entry
- https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76acThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html
- https://lists.x.org/archives/xorg-announce/2017-October/002808.htmlVendor Advisory
- https://security.gentoo.org/glsa/201710-30Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.