Authentication Bypass

sddm is vulnerable to authentication bypass. The X server allows unprivileged users to create a connection to the server without authentication due to an incorrect start and race condition during Xauthority file creation...

[SECURITY] Fedora 33 Update: xorg-x11-server-1.20.10-1.fc33

X.Org X11 X server...

[SECURITY] Fedora 32 Update: xorg-x11-server-1.20.10-1.fc32

X.Org X11 X server...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : X.Org X Server vulnerabilities (USN-4656-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4656-1 advisory. Jan-Niklas Sohn discovered that the X.Org X Server XKB extension incorrectly handled certain inputs. A local attacker could...

FreeBSD : xorg-server -- Multiple input validation failures in X server XKB extension (76c8b690-340b-11eb-a2b7-54e1ad3d6335)

The X.org project reports : These issues can lead to privileges elevations for authorized clients on systems where the X server is running privileged. Insufficient checks on the lengths of the XkbSetMap request can lead to out of bounds memory accesses in the X server. Insufficient checks on inpu...

USN-4656-1: X.Org X Server vulnerabilities

Jan-Niklas Sohn discovered that the X.Org X Server XKB extension incorrectly handled certain inputs. A local attacker could possibly use this issue to escalate privileges...

xorg-server -- Multiple input validation failures in X server XKB extension

The X.org project reports: These issues can lead to privileges elevations for authorized clients on systems where the X server is running privileged. Insufficient checks on the lengths of the XkbSetMap request can lead to out of bounds memory accesses in the X server. Insufficient checks on input...

Debian DLA-2436-1 : sddm security update

It was discovered that there was an issue in the sddm display manager where local unprivileged users could create a connection to the X server. For Debian 9 'Stretch', this problem has been fixed in version 0.14.0-4+deb9u2. We recommend that you upgrade your sddm packages. For the detailed securi...

Debian: Security Advisory (DLA-2436-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2020 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

[SECURITY] [DLA 2436-1] sddm security update

------------------------------------------------------------------------- Debian LTS Advisory DLA-2436-1 [email protected] https://www.debian.org/lts/security/ Chris Lamb November 06, 2020 https://wiki.debian.org/LTS -...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

Race condition

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

CVE-2020-28049

CVE-2020-28049 affects SDDM prior to 0.19.0. A race during Xauthority file creation allows a local unprivileged user to connect to the X server for a brief window, exposing X display contents and potentially keystrokes or clipboard data. Root cause: race condition in Xauthority handling when star...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

CVE-2020-28049

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents an...

PT-2020-5744 · Sddm +2 · Sddm +2

Name of the Vulnerable Software and Affected Versions: SDDM versions prior to 0.19.0 Description: The issue is related to the incorrect start of the X server by SDDM, allowing local unprivileged users to create a connection to the X server without proper authentication for a short time period. Th...