CVE-2017-13723

Gentoo Linux Security Advisory 201710-30

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En versiones anteriores a la 1.19.4 de X.Org Server (también llamado xserver y xorg-server) un atacante autenticado en el servidor X podría provocar un desbordamiento de búfer global, causando cierres inesperados del servidor X o dando lugar a otros posibles problemas mediante la inyección de átomos relacionados con XKB grandes o mal formados y accediendo a ellos mediante xkbcomp.

Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly replace shared memory segments of other X clients in the same session. Michal Srb discovered that the X.Org X server incorrectly handled XKB buffers. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly execute arbitrary code. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-08-28 CVE Reserved
2017-10-05 CVE Published
2024-08-05 CVE Updated
2025-06-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (7)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2017/10/04/10	Mailing List
http://www.securityfocus.com/bid/101253	Third Party Advisory
https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76ac	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.debian.org/security/2017/dsa-4000	2018-02-04
https://lists.x.org/archives/xorg-announce/2017-October/002808.html	2018-02-04
https://security.gentoo.org/glsa/201710-30	2018-02-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
X.org Search vendor "X.org"		Xorg-server Search vendor "X.org" for product "Xorg-server"				<= 1.19.3 Search vendor "X.org" for product "Xorg-server" and version " <= 1.19.3"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected