xorg-x11-server: Incorrect permission check in Xorg X server allows for privilege escalation

An incorrect permission check for -modulepath and -logfile options when starting Xorg X server allows unprivileged users with the ability to log in to the system via physical console to escalate their privileges and run arbitrary code under root privileges...

X.Org X Server: Privilege escalation

Background The X Window System is a graphical windowing system based on a client/server model. Description An incorrect permission check for -modulepath and -logfile options when starting Xorg. X server allows unprivileged users with the ability to log in to the system via physical console to...

X.Org Flaw Allows Privilege Escalation in Linux Systems

A local privilege-escalation and file-overwrite vulnerability in X.Org X server opens the door to trivial compromise in Linux systems that use the open-source software. The X server is a core graphics and windowing technology that can be found in most Linux and BSD distributions that use a...

New Privilege Escalation Flaw Affects Most Linux Distributions

An Indian security researcher has discovered a highly critical flaw in X.Org Server package that impacts OpenBSD and most Linux distributions, including Debian, Ubuntu, CentOS, Red Hat, and Fedora. Xorg X server is a popular open-source implementation of the X11 system display server that offers ...

[SECURITY] Fedora 28 Update: libxkbcommon-0.8.2-1.fc28

libxkbcommon is the X.Org library for compiling XKB maps into formats usabl e by the X Server or other display servers...

CVE-2018-14600

An out of bounds write, limited to NULL bytes, was discovered in libX11 in functions XListExtensions and XGetFontPath. The length field is considered as a signed value, which makes the library access memory before the intended buffer. An attacker who can either configure a malicious X server or...

ALPINE-CVE-2018-14598

An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS segmentation fault...

Code injection

Some Lenovo System x server BIOS/UEFI versions, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it. As a result, an attacker with physical access to the system could boot unsigned code...

CVE-2017-3775

CVE-2017-3775 affects Lenovo System x server BIOS/UEFI where, when Secure Boot is enabled, some versions fail to properly authenticate signed code before boot. This could allow an attacker with physical access to boot unsigned code. Lenovo’s advisory LEN-20241 recommends applying the relevant BIO...

SUSE SLED12 / SLES12 Security Update : libXfont (SUSE-SU-2018:0334-1)

This update for libXfont fixes several issues. These security issues were fixed : - CVE-2017-13720: Improper check for end of string in PatterMatch caused invalid reads bsc1054285 - CVE-2017-13722: Malformed PCF file could have caused DoS or leak information bsc1049692 - Prevent the X server from...

Input validation

xorg-x11-server before 1.19.5 was missing length validation in XFIXES extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

Input validation

xorg-x11-server before 1.19.5 was missing length validation in X-Resource extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

Input validation

xorg-x11-server before 1.19.5 was missing length validation in XFree86 DRI extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

CVE-2017-12177

xorg-x11-server before 1.19.5 was vulnerable to integer overflow in ProcDbeGetVisualInfo function allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

CVE-2017-12187

xorg-x11-server before 1.19.5 was missing length validation in RENDER extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

Input validation

xorg-x11-server before 1.19.5 was missing length validation in RENDER extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

CVE-2017-12178

xorg-x11-server before 1.19.5 had wrong extra length check in ProcXIChangeHierarchy function allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

CVE-2017-12182

xorg-x11-server before 1.19.5 was missing length validation in XFree86 DRI extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

CVE-2017-12186

xorg-x11-server before 1.19.5 was missing length validation in X-Resource extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code...

Input validation

xorg-x11-server before 1.19.5 was missing extra length validation in ProcEstablishConnection function allowing malicious X client to cause X server to crash or possibly execute arbitrary code...