title: Junos OS: SRX Series and MX Series: Memory leak due to receipt of specially crafted SIP calls
description: An Improper Handling of Unexpected Data Type vulnerability in the handling of SIP calls in Juniper Networks Junos OS on SRX Series and MX Series platforms allows an attacker to cause a memory leak leading to Denial of Services (DoS). This issue occurs on all MX Series platforms with MS-MPC or MS-MIC card and all SRX Series platforms where SIP ALG is enabled. Successful exploitation of this vulnerability prevents additional SIP calls and applications from succeeding. The SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. To confirm whether SIP ALG is enabled on SRX use the following command: user@host> show security alg status | match sip SIP : Enabled This issue affects Juniper Networks Junos OS on SRX Series and on MX Series: All versions prior to 19.3R3-S7; 19.4 versions prior to 19.4R2-S8, 19.4R3-S10; 20.1 versions 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S6; 20.3 versions prior to 20.3R3-S6; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2-S2, 21.4R3; 22.1 versions prior to 22.1R1-S2, 22.1R2, 22.1R3-S1. This issue does not affect Juniper Networks Junos OS on SRX Series and on MX Series: All versions prior to 18.2R1.
problem types: CWE-911 Improper Update of Reference Count
affected:
{
vendor: Juniper Networks
product: Junos OS
versions:
version: unspecified, lessThan: 18.2R1, status: unaffected, versionType: custom
version: unspecified, lessThan: 19.3R3-S7, status: affected, versionType: custom
version: 19.4, status: affected, lessThan: 19.4R2-S8, 19.4R3-S10, versionType: custom
version: 20.1R1, status: affected, lessThan: 20.1*, versionType: custom
version: 20.2, status: affected, lessThan: 20.2R3-S6, versionType: custom
version: 20.3, status: affected, lessThan: 20.3R3-S6, versionType: custom
version: 20.4, status: affected, lessThan: 20.4R3-S5, versionType: custom
version: 21.1, status: affected, lessThan: 21.1R3-S5, versionType: custom
version: 21.2, status: affected, lessThan: 21.2R3-S1, versionType: custom
version: 21.3, status: affected, lessThan: 21.3R3, versionType: custom
version: 21.4, status: affected, lessThan: 21.4R2-S2, 21.4R3, versionType: custom
version: 22.1, status: affected, lessThan: 22.1R1-S2, 22.1R2, 22.1R3-S1, versionType: custom
platforms: MX Series, SRX Series
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: 19.3R3-S7, 19.4R2-S8, 19.4R3-S10, 20.2R3-S6, 20.3R3-S6, 20.4R3-S5, 21.1R3-S5, 21.2R3-S1, 21.3R3, 21.4R2-S2, 21.4R3, 22.1R1-S2, 22.1R2, 22.1R3-S1, 22.2R1, 22.3R1, and all subsequent releases.
workarounds: There are no known workarounds for this issue