Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities (USN-3362-1)

Ubuntu Security Notice (C) 2017 Canonical, Inc. / NASL script (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

It was discovered that the X.Org X server incorrectly handled
endianness conversion of certain X events. An attacker able to connect
to an X server, either locally or remotely, could use this issue to
crash the server, or possibly execute arbitrary code as an
administrator. (CVE-2017-10971)

It was discovered that the X.Org X server incorrectly handled
endianness conversion of certain X events. An attacker able to connect
to an X server, either locally or remotely, could use this issue to
possibly obtain sensitive information. (CVE-2017-10972)

Eric Sesterhenn discovered that the X.Org X server incorrectly
compared MIT cookies. An attacker could possibly use this issue to
perform a timing attack and recover the MIT cookie. (CVE-2017-2624).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected xserver-xorg-core, xserver-xorg-core-hwe-16.04 and
/ or xserver-xorg-core-lts-xenial packages.

Risk factor :

Medium / CVSS Base Score : 6.5
(CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P)
CVSS Temporal Score : 4.8
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 101949 ()

Bugtraq ID:

CVE ID: CVE-2017-10971
CVE-2017-10972
CVE-2017-2624

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