Detections
Analytics

Sprecher Automation SPRECON-E TCP SACK PANIC (CVE-2019-11479)

high Tenable OT Security Plugin ID 501748

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.

An analysis for SPRECON-E systems lead to the result, that only FALCON (PU244x) and T3 MC33/34 product series are affected.

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?774b082f

http://www.nessus.org/u?27335f5c

http://www.nessus.org/u?178ab433

Plugin Details

Severity: High

ID: 501748

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 10/3/2023

Updated: 10/4/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2019-11479

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:/o:sprecher-automation:sprecon-e:8.64b

Required KB Items: Tenable.ot/SprecherAutomation

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2019

Vulnerability Publication Date: 6/19/2019

Reference Information

CVE: CVE-2019-11479