Juniper Junos OS FPC Crash (JSA11229)

medium Nessus Plugin ID 161261

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA11229 advisory.

A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows an adjacent attacker to cause a Denial of Service (DoS) by sending genuine BGP flowspec packets which cause an FPC heap memory leak. Once having run out of memory the FPC will crash and restart along with a core dump. Continued receipted of these packets will create a sustained Denial of Service (DoS) condition.

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

Solution

Apply the relevant Junos software release referenced in Juniper advisory JSA11229

See Also

https://kb.juniper.net/JSA11229

Plugin Details

Severity: Medium

ID: 161261

File Name: juniper_jsa11229.nasl

Version: 1.5

Type: combined

Published: 5/18/2022

Updated: 5/19/2022

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.9

Temporal Score: 2.1

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

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

CVSS Score Source: CVE-2021-31367

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:A/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:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

Required KB Items: Host/Juniper/model, Host/Juniper/JUNOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2021

Vulnerability Publication Date: 9/28/2021

Reference Information

CVE: CVE-2021-31367

IAVA: 2021-A-0478-S

JSA: JSA11229