Synology DSM HTTP/2 Implementations Window Size and Stream Prioritization Manipulation (CVE-2019-9511)

high Tenable OT Security Plugin ID 502477

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

http://www.nessus.org/u?a5b121dc

http://www.nessus.org/u?c747aef2

http://www.nessus.org/u?b87b2fef

http://www.nessus.org/u?3f826b71

http://www.nessus.org/u?b6561d3c

http://www.nessus.org/u?0c75a914

https://access.redhat.com/errata/RHSA-2019:2692

https://access.redhat.com/errata/RHSA-2019:2745

https://access.redhat.com/errata/RHSA-2019:2746

https://access.redhat.com/errata/RHSA-2019:2775

https://access.redhat.com/errata/RHSA-2019:2799

https://access.redhat.com/errata/RHSA-2019:2925

https://access.redhat.com/errata/RHSA-2019:2939

https://access.redhat.com/errata/RHSA-2019:2949

https://access.redhat.com/errata/RHSA-2019:2955

https://access.redhat.com/errata/RHSA-2019:2966

https://access.redhat.com/errata/RHSA-2019:3041

https://access.redhat.com/errata/RHSA-2019:3932

https://access.redhat.com/errata/RHSA-2019:3933

https://access.redhat.com/errata/RHSA-2019:3935

https://access.redhat.com/errata/RHSA-2019:4018

https://access.redhat.com/errata/RHSA-2019:4019

https://access.redhat.com/errata/RHSA-2019:4020

https://access.redhat.com/errata/RHSA-2019:4021

http://www.nessus.org/u?5ca4073f

https://kb.cert.org/vuls/id/605641/

https://kc.mcafee.com/corporate/index?page=content&id=SB10296

http://www.nessus.org/u?d0d41817

http://www.nessus.org/u?a28dfd49

http://www.nessus.org/u?059d9833

http://www.nessus.org/u?eedfd23f

http://www.nessus.org/u?ffb73998

http://www.nessus.org/u?855995a0

https://seclists.org/bugtraq/2019/Aug/40

https://seclists.org/bugtraq/2019/Sep/1

https://security.netapp.com/advisory/ntap-20190823-0002/

https://security.netapp.com/advisory/ntap-20190823-0005/

https://support.f5.com/csp/article/K02591030

http://www.nessus.org/u?203b5929

https://usn.ubuntu.com/4099-1/

https://www.debian.org/security/2019/dsa-4505

https://www.debian.org/security/2019/dsa-4511

https://www.debian.org/security/2020/dsa-4669

https://www.oracle.com/security-alerts/cpujan2021.html

https://www.oracle.com/security-alerts/cpuoct2020.html

http://www.nessus.org/u?b370bc74

https://www.synology.com/security/advisory/Synology_SA_19_33

Plugin Details

Severity: High

ID: 502477

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 10/1/2024

Updated: 10/2/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2019-9511

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/a:synology:diskstation_manager:6.2

Required KB Items: Tenable.ot/Synology

Exploit Ease: No known exploits are available

Patch Publication Date: 8/13/2019

Vulnerability Publication Date: 8/13/2019

Reference Information

CVE: CVE-2019-9511

CWE: 400, 770