Sicherheitslücken in libx11

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.

• Auf 2:1.7.5-1ubuntu0.4 aktualisieren

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.

• Auf 2:1.7.5-1ubuntu0.4 aktualisieren

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.

• Auf 2:1.7.5-1ubuntu0.4 aktualisieren

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.

• Auf 2:1.7.5-1ubuntu0.4 aktualisieren

Libx11: integer overflow in xcreateimage() leading to a heap overflow

A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.

• Auf 2:1.7.5-1ubuntu0.3 aktualisieren

Libx11: stack exhaustion from infinite recursion in putsubimage()

A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.

• Auf 2:1.7.5-1ubuntu0.3 aktualisieren

Libx11: out-of-bounds memory access in _xkbreadkeysyms()

A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.

• Auf 2:1.7.5-1ubuntu0.3 aktualisieren

CVE-2023-3138

A vulnerability was found in libX11. The security flaw occurs because the functions in src/InitExt.c in libX11 do not check that the values provided for the Request, Event, or Error IDs are within the bounds of the arrays that those functions write to, using those IDs as array indexes. They trust that they were called with values provided by an Xserver adhering to the bounds specified in the X11 protocol, as all X servers provided by X.Org do. As the protocol only specifies a single byte for these values, an out-of-bounds value provided by a malicious server (or a malicious proxy-in-the-middle) can only overwrite other portions of the Display

• Auf 2:1.7.5-1ubuntu0.2 aktualisieren

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.