RHEL 7 : tigervnc (RHSA-2020:3875)

medium Nessus Plugin ID 141028
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VPR Score: 5.9

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3875 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 packages.

See Also

https://cwe.mitre.org/data/definitions/121.html

https://cwe.mitre.org/data/definitions/122.html

https://cwe.mitre.org/data/definitions/672.html

https://access.redhat.com/security/cve/CVE-2019-15691

https://access.redhat.com/security/cve/CVE-2019-15692

https://access.redhat.com/security/cve/CVE-2019-15693

https://access.redhat.com/security/cve/CVE-2019-15694

https://access.redhat.com/security/cve/CVE-2019-15695

https://access.redhat.com/errata/RHSA-2020:3875

https://bugzilla.redhat.com/1789527

https://bugzilla.redhat.com/1789908

https://bugzilla.redhat.com/1790313

https://bugzilla.redhat.com/1790315

https://bugzilla.redhat.com/1790318

Plugin Details

Severity: Medium

ID: 141028

File Name: redhat-RHSA-2020-3875.nasl

Version: 1.4

Type: local

Agent: unix

Published: 9/29/2020

Updated: 3/24/2021

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 5.9

CVSS Score Source: CVE-2019-15695

CVSS v2.0

Base Score: 6.5

Temporal Score: 4.8

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

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

CVSS v3.0

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: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:tigervnc, p-cpe:/a:redhat:enterprise_linux:tigervnc-icons, p-cpe:/a:redhat:enterprise_linux:tigervnc-license, p-cpe:/a:redhat:enterprise_linux:tigervnc-server, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-applet, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-minimal, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-module

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/29/2020

Vulnerability Publication Date: 12/26/2019

Reference Information

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

RHSA: 2020:3875

CWE: 121, 122, 672