CVE-2018-0051

Summary

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 Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS12.1X46 < 12.1X46-D77affected
Juniper NetworksJunos OS12.3X48 < 12.3X48-D70affected
Juniper NetworksJunos OS15.1X49 < 15.1X49-D140affected
Juniper NetworksJunos OS15.1F6affected
Juniper NetworksJunos OS15.1 < 15.1R4-S9, 15.1R7-S1affected
Juniper NetworksJunos OS16.1 < 16.1R4-S9, 16.1R6-S1, 16.1R7affected
Juniper NetworksJunos OS16.2 < 16.2R2-S7, 16.2R3affected
Juniper NetworksJunos OS17.1 < 17.1R2-S7, 17.1R3affected
Juniper NetworksJunos OS17.2 < 17.2R1-S6, 17.2R2-S4, 17.2R3affected
Juniper NetworksJunos OS17.3 < 17.3R1-S5, 17.3R2-S2, 17.3R3affected
Juniper NetworksJunos OS17.4 < 17.4R2affected

Weaknesses

  • Denial of Service

Workarounds

Disable the use of the SIP ALG feature if it is not needed.

ADP Enrichment

CVE Program Container

Additional References

References