Oracle Linux 8 : tigervnc (ELSA-2020-1497)

high Nessus Plugin ID 135748
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

From Red Hat Security Advisory 2020:1497 :

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1497 advisory.

- tigervnc: Stack use-after-return due to incorrect usage of stack memory in ZRLEDecoder (CVE-2019-15691)

- tigervnc: Heap buffer overflow triggered from CopyRectDecoder due to incorrect value checks (CVE-2019-15692)

- tigervnc: Heap buffer overflow in TightDecoder::FilterGradient (CVE-2019-15693)

- tigervnc: Heap buffer overflow in DecodeManager::decodeRect (CVE-2019-15694)

- tigervnc: Stack buffer overflow in CMsgReader::readSetCursor (CVE-2019-15695)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected tigervnc packages.

See Also

https://oss.oracle.com/pipermail/el-errata/2020-April/009848.html

Plugin Details

Severity: High

ID: 135748

File Name: oraclelinux_ELSA-2020-1497.nasl

Version: 1.3

Type: local

Agent: unix

Published: 4/20/2020

Updated: 6/5/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

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

Vulnerability Information

CPE: cpe:2.3:o:oracle:linux:8:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc-icons:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc-license:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc-server:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc-server-applet:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc-server-minimal:*:*:*:*:*:*:*, p-cpe:2.3:a:oracle:linux:tigervnc-server-module:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 4/19/2020

Vulnerability Publication Date: 12/26/2019

Reference Information

CVE: CVE-2019-15693, CVE-2019-15692, CVE-2019-15691, CVE-2019-15694, CVE-2019-15695

RHSA: 2020:1497