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CVE Vulnerabilities

CVE-2020-14347

Improper Initialization

Published: Aug 05, 2020 | Modified: Aug 29, 2025
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
2.1 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
5.5 MODERATE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-14347
CWEhttps://cwe.mitre.org/data/definitions/665.html

A flaw was found in the way xserver memory was not properly initialized. This could leak parts of server memory to the X client. In cases where Xorg server runs with elevated privileges, this could result in possible ASLR bypass. Xorg-server before version 1.20.9 is vulnerable.

Weakness

The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Affected Software

NameVendorStart VersionEnd Version
X_serverX.org*1.20.9 (excluding)
Red Hat Enterprise Linux 7RedHatxorg-x11-server-0:1.20.4-15.el7_9*
Red Hat Enterprise Linux 8RedHategl-wayland-0:1.1.5-3.el8*
Red Hat Enterprise Linux 8RedHatlibdrm-0:2.4.103-1.el8*
Red Hat Enterprise Linux 8RedHatlibglvnd-1:1.3.2-1.el8*
Red Hat Enterprise Linux 8RedHatlibinput-0:1.16.3-1.el8*
Red Hat Enterprise Linux 8RedHatlibwacom-0:1.6-2.el8*
Red Hat Enterprise Linux 8RedHatlibX11-0:1.6.8-4.el8*
Red Hat Enterprise Linux 8RedHatmesa-0:20.3.3-2.el8*
Red Hat Enterprise Linux 8RedHatxorg-x11-drivers-0:7.7-30.el8*
Red Hat Enterprise Linux 8RedHatxorg-x11-server-0:1.20.10-1.el8*
XorgUbuntutrusty*
Xorg-serverUbuntubionic*
Xorg-serverUbuntudevel*
Xorg-serverUbuntuesm-infra-legacy/trusty*
Xorg-serverUbuntuesm-infra/bionic*
Xorg-serverUbuntuesm-infra/focal*
Xorg-serverUbuntuesm-infra/xenial*
Xorg-serverUbuntufocal*
Xorg-serverUbuntutrusty*
Xorg-serverUbuntutrusty/esm*
Xorg-serverUbuntuupstream*
Xorg-serverUbuntuxenial*
Xorg-server-hwe-16.04Ubuntuesm-infra/xenial*
Xorg-server-hwe-16.04Ubuntuupstream*
Xorg-server-hwe-16.04Ubuntuxenial*
Xorg-server-hwe-18.04Ubuntubionic*
Xorg-server-hwe-18.04Ubuntuesm-infra/bionic*
Xorg-server-hwe-18.04Ubuntuupstream*
Xorg-server-lts-utopicUbuntutrusty*
Xorg-server-lts-vividUbuntutrusty*
Xorg-server-lts-wilyUbuntutrusty*
Xorg-server-lts-xenialUbuntutrusty*

Potential Mitigations

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • For example, in Java, if the programmer does not explicitly initialize a variable, then the code could produce a compile-time error (if the variable is local) or automatically initialize the variable to the default value for the variable’s type. In Perl, if explicit initialization is not performed, then a default value of undef is assigned, which is interpreted as 0, false, or an equivalent value depending on the context in which the variable is accessed.

References

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