Juniper Junos ALG Fragmented Traffic Handling MS-MPC / MS-MIC Service PIC DoS (JSA10794)

high Nessus Plugin ID 102707
New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it is different from CVSS.

VPR Score: 3.6


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


According to its self-reported version and model number, the remote Juniper Junos device is affected by a denial of service vulnerability in the Application Layer Gateway (ALG) that is triggered when handling a large amount of fragmented packets. An unauthenticated, remote attacker can exploit this to crash an MS-MPC or MS-MIC service physical interface card (PIC).

Note that the device is only vulnerable if NAT or stateful-firewall rules are configured with ALGs enabled


Upgrade to the relevant Junos software release referenced in Juniper security advisory JSA10794. Alternatively, disable NAT and the stateful-firewall if they are not required.

See Also

Plugin Details

Severity: High

ID: 102707

File Name: juniper_jsa10794.nasl

Version: 1.4

Type: combined

Published: 8/23/2017

Updated: 7/13/2018

Dependencies: junos_version.nasl

Configuration: Enable paranoid mode

Risk Information

Risk Factor: High

VPR Score: 3.6

CVSS v2.0

Base Score: 7.1

Temporal Score: 5.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

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

CVSS v3.0

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: cpe:/o:juniper:junos

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/12/2017

Vulnerability Publication Date: 7/12/2017

Reference Information

CVE: CVE-2017-2346

JSA: JSA10794