high
7.5
CWE
130
Advisory Published
Updated

CVE-2019-0055: Junos OS: SRX Series: An attacker may cause flowd to crash by sending certain valid SIP traffic to a device with SIP ALG enabled.

First published: Wed Oct 09 2019(Updated: )

A vulnerability in the SIP ALG packet processing service of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) to the device by sending specific types of valid SIP traffic to the device. In this case, the flowd process crashes and generates a core dump while processing SIP ALG traffic. Continued receipt of these valid SIP packets will result in a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 12.3X48 versions prior to 12.3X48-D61, 12.3X48-D65 on SRX Series; 15.1X49 versions prior to 15.1X49-D130 on SRX Series; 17.3 versions prior to 17.3R3 on SRX Series; 17.4 versions prior to 17.4R2 on SRX Series.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Juniper JUNOS=12.3x48-d10
Juniper JUNOS=12.3x48-d15
Juniper JUNOS=12.3x48-d25
Juniper JUNOS=12.3x48-d30
Juniper JUNOS=12.3x48-d35
Juniper JUNOS=12.3x48-d40
Juniper JUNOS=12.3x48-d45
Juniper JUNOS=12.3x48-d50
Juniper JUNOS=12.3x48-d55
Juniper JUNOS=12.3x48-d60
Juniper Csrx
Juniper SRX100
Juniper SRX110
Juniper SRX1400
Juniper SRX1500
Juniper SRX210
Juniper SRX220
Juniper SRX240
Juniper SRX300
Juniper SRX320
Juniper SRX340
Juniper SRX3400
Juniper SRX345
Juniper SRX3600
Juniper SRX4100
Juniper SRX4200
Juniper SRX4600
Juniper SRX5400
Juniper SRX550
Juniper SRX550
juniper srx5600
Juniper SRX5800
Juniper SRX650
Juniper vSRX
Juniper JUNOS=15.1x49
Juniper JUNOS=15.1x49-d10
Juniper JUNOS=15.1x49-d100
Juniper JUNOS=15.1x49-d110
Juniper JUNOS=15.1x49-d120
Juniper JUNOS=15.1x49-d20
Juniper JUNOS=15.1x49-d30
Juniper JUNOS=15.1x49-d35
Juniper JUNOS=15.1x49-d40
Juniper JUNOS=15.1x49-d45
Juniper JUNOS=15.1x49-d50
Juniper JUNOS=15.1x49-d55
Juniper JUNOS=15.1x49-d60
Juniper JUNOS=15.1x49-d65
Juniper JUNOS=15.1x49-d70
Juniper JUNOS=15.1x49-d75
Juniper JUNOS=15.1x49-d80
Juniper JUNOS=15.1x49-d90
Juniper JUNOS=17.3
Juniper JUNOS=17.3-r2
Juniper JUNOS=17.3-r2-s1
Juniper JUNOS=17.3-r2-s2
Juniper JUNOS=17.4
Juniper JUNOS=17.4-r1
Juniper JUNOS=17.4-r1-s1
Juniper JUNOS=17.4-r1-s2
Juniper JUNOS=17.4-r1-s4
Juniper JUNOS=17.4-r1-s6
Juniper JUNOS=17.4-r1-s7

Remedy

The following software releases have been updated to resolve this specific issue: 12.3X48-D61, 12.3X48-D65, 15.1X49-D130, 17.3R3, 17.4R2, 18.1R1, and all subsequent releases.

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-0055?

    CVE-2019-0055 has been assigned a severity rating of high due to its potential to cause a Denial of Service (DoS) by crashing the flowd process.

  • How do I fix CVE-2019-0055?

    To fix CVE-2019-0055, upgrade to a version of Junos OS that is not vulnerable, specifically versions after 12.3x48-d60 and 15.1x49-d90.

  • What products are affected by CVE-2019-0055?

    CVE-2019-0055 affects specific Juniper Networks Junos OS versions, including 12.3x48-d10 through 12.3x48-d60 and 15.1x49 versions.

  • What type of attack can exploit CVE-2019-0055?

    CVE-2019-0055 can be exploited by sending specific types of valid Session Initiation Protocol (SIP) traffic to trigger a Denial of Service.

  • Are all Juniper products vulnerable to CVE-2019-0055?

    No, only certain versions of the Junos OS are affected; many devices, such as various models of the SRX series, are not vulnerable.

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