CVE-2017-2346

MS-MPC or MS-MIC crash when passing large fragmented traffic through an ALG

MEDIUM

5.9

CVSS Score

Published: July 14, 2017 at 02:00 PM UTC

Updated: June 17, 2026 at 01:16 AM UTC

2 products affected across 2 vendorsJunosMx

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Severity

MEDIUM5.9

Exploit prediction

EPSS 1%

Description

An MS-MPC or MS-MIC Service PIC may crash when large fragmented packets are passed through an Application Layer Gateway (ALG). Repeated crashes of the Service PC can result in an extended denial of service condition. The issue can be seen only if NAT or stateful-firewall rules are configured with ALGs enabled. This issue was caused by the code change for PR 1182910 in Junos OS 14.1X55-D30, 14.1X55-D35, 14.2R7, 15.1R5, and 16.1R2. No other versions of Junos OS and no other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS on MX platforms running: 14.1X55 from 14.1X55-D30 to releases prior to 14.1X55-D35; 14.2R from 14.2R7 to releases prior to 14.2R7-S4, 14.2R8; 15.1R from 15.1R5 to releases prior to 15.1R5-S2, 15.1R6; 16.1R from 16.1R2 to releases prior to 16.1R3-S2, 16.1R4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

14.1X55-D30 ≤ v < 14.1X55-D3514.2R7 ≤ v < 14.2R7-S415.1R5 ≤ v < 15.1R5-S216.1R2 ≤ v < 16.1R3-S214.1x55 14.1x55 d30 14.2 r 14.2 r1 14.2 r2 14.2 r3 14.2 r4 14.2 r5 14.2 r6 14.2 r7 15.1 r 15.1 r1 15.1 r2 15.1 r3 15.1 r4 15.1 r5 15.1 r6 16.1 r 16.1 r1 16.1 r2 16.1 r3 16.1 r4

Affected range stops below 14.1X55-D35, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.2R7-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1R5-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R3-S2, so it looks safe — our inference, not a vendor statement

juniper-mx (environment)

Mx · Juniperdevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA10794

References (2)

VDB Entryx_refsource_SECTRACKThird Party Advisory

Source: [email protected]

http://www.securitytracker.com/id/1038895

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA10794

CVSS

5.9MEDIUMjuniper

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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