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FreeBSD : xorg-server -- Pixel Data Uninitialized Memory Information Disclosure (3c7ba82a-d3fb-11ea-9aba-0c9d925bbbc0)

medium Nessus Plugin ID 139266

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The X.org project reports :

Allocation for pixmap data in AllocatePixmap() does not initialize the memory in xserver, it leads to leak uninitialize heap memory to clients. When the X server runs with elevated privileges.

This flaw can lead to ASLR bypass, which when combined with other flaws (known/unknown) could lead to lead to privilege elevation in the client.

Solution

Update the affected packages.

See Also

https://lists.x.org/archives/xorg-announce/2020-July/003051.html

http://www.nessus.org/u?5be855a1

Plugin Details

Severity: Medium

ID: 139266

File Name: freebsd_pkg_3c7ba82ad3fb11ea9aba0c9d925bbbc0.nasl

Version: 1.3

Type: local

Published: 8/3/2020

Updated: 8/10/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2020-14347

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:xephyr, p-cpe:/a:freebsd:freebsd:xorg-dmx, p-cpe:/a:freebsd:freebsd:xorg-nestserver, p-cpe:/a:freebsd:freebsd:xorg-server, p-cpe:/a:freebsd:freebsd:xorg-vfbserver, p-cpe:/a:freebsd:freebsd:xwayland, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 8/1/2020

Vulnerability Publication Date: 7/31/2020

Reference Information

CVE: CVE-2020-14347