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CVE-2018-0051

Junos OS: Denial of Service vulnerability in MS-PIC, MS-MIC, MS-MPC, MS-DPC and SRX flow daemon (flowd) related to SIP ALG

HIGH
7.5
CVSS Score
Published: October 10, 2018 at 06:00 PM UTC
Updated: June 17, 2026 at 01:29 AM UTC
1 product affected across 1 vendorJunos

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

A Denial of Service vulnerability in the SIP application layer gateway (ALG) component of Junos OS based platforms allows an attacker to crash MS-PIC, MS-MIC, MS-MPC, MS-DPC or SRX flow daemon (flowd) process. This issue affects Junos OS devices with NAT or stateful firewall configuration in combination with the SIP ALG enabled. SIP ALG is enabled by default on SRX Series devices except for SRX-HE devices. SRX-HE devices have SIP ALG disabled by default. The status of ALGs in SRX device can be obtained by executing the command: show security alg status Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D77; 12.3X48 versions prior to 12.3X48-D70; 15.1X49 versions prior to 15.1X49-D140; 15.1 versions prior to 15.1R4-S9, 15.1R7-S1; 15.1F6; 16.1 versions prior to 16.1R4-S9, 16.1R6-S1, 16.1R7; 16.2 versions prior to 16.2R2-S7, 16.2R3; 17.1 versions prior to 17.1R2-S7, 17.1R3; 17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3; 17.3 versions prior to 17.3R1-S5, 17.3R2-S2, 17.3R3; 17.4 versions prior to 17.4R2. No other Juniper Networks products or platforms are affected by this issue.

Affected

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

Junos· Juniper Networks
95%
12.1X46 ≤ v < 12.1X46-D7712.3X48 ≤ v < 12.3X48-D7015.1 ≤ v < 15.1R4-S9, 15.1R7-S115.1X49 ≤ v < 15.1X49-D14016.1 ≤ v < 16.1R4-S9, 16.1R6-S1, 16.1R716.2 ≤ v < 16.2R2-S7, 16.2R317.1 ≤ v < 17.1R2-S7, 17.1R317.2 ≤ v < 17.2R1-S6, 17.2R2-S4, 17.2R317.3 ≤ v < 17.3R1-S5, 17.3R2-S2, 17.3R317.4 ≤ v < 17.4R212.1X4612.1x4612.1x46 d1012.1x46 d1512.1x46 d2012.1x46 d2512.1x46 d3012.1x46 d3512.1x46 d4012.1x46 d4512.1x46 d5012.1x46 d5512.1x46 d6012.1x46 d6512.3X4812.3x4812.3x48 d1012.3x48 d1512.3x48 d2012.3x48 d2512.3x48 d3012.3x48 d3512.3x48 d4012.3x48 d4512.3x48 d5012.3x48 d5512.3x48 d6012.3x48 d6515.115.1 f615.1 r115.1 r215.1 r315.1 r7-s115.1F615.1X4915.1x4915.1x49 d1015.1x49 d10015.1x49 d11015.1x49 d12015.1x49 d13015.1x49 d2015.1x49 d3015.1x49 d3515.1x49 d4015.1x49 d4515.1x49 d5015.1x49 d5515.1x49 d6015.1x49 d6515.1x49 d7515.1x49 d8015.1x49 d9016.116.1 r116.1 r216.1 r316.1 r516.1 r6-s116.1 r716.216.2 r116.2 r317.117.1 r117.1 r217.1 r317.217.2 r117.2 r2-s417.2 r317.317.3 r2-s217.3 r317.417.4 r1
Affected range stops below 12.1X46-D77, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.3X48-D70, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.1R4-S9, 15.1R7-S1, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.1X49-D140, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.1R4-S9, 16.1R6-S1, 16.1R7, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.2R2-S7, 16.2R3, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.1R2-S7, 17.1R3, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.2R1-S6, 17.2R2-S4, 17.2R3, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.3R1-S5, 17.3R2-S2, 17.3R3, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.4R2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

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

Patch and advisory references

References (2)

VDB Entryx_refsource_SECTRACKThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1041852
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://kb.juniper.net/JSA10885

CVSS

7.5HIGHjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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