libx11 vulnerabilities

Out-of-bounds read in libX11's byte-oriented codeset parser

An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

• Update to 2:1.6.9-2ubuntu1.6+esm1

Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

• Update to 2:1.6.9-2ubuntu1.6+esm1

Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

• Update to 2:1.6.9-2ubuntu1.6+esm1

libX11 XkbGetMap Reply Heap-based Buffer Overflow

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.

• Update to 2:1.6.9-2ubuntu1.6+esm1

CVE-2020-25697

A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an attacker to take control of an X application by impersonating the server it is expecting to connect to.