CVE-2019-12646 : A vulnerability in the Network Address Translation (NAT) Session Initiation Prot

A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper processing of transient SIP packets on which NAT is performed on an affected device. An attacker could exploit this vulnerability by using UDP port 5060 to send crafted SIP packets through an affected device that is performing NAT for SIP packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Published 2019-09-25 20:15:10

Updated 2023-05-22 18:57:25

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2019-12646

Cisco » Ios Xe » Version: 15.4(3)s
cpe:2.3:o:cisco:ios_xe:15.4\(3\)s:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.3.1
cpe:2.3:o:cisco:ios_xe:16.3.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.4.1
cpe:2.3:o:cisco:ios_xe:16.4.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.5.1
cpe:2.3:o:cisco:ios_xe:16.5.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.6.1
cpe:2.3:o:cisco:ios_xe:16.6.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.8.1
cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 15.5(3)s
cpe:2.3:o:cisco:ios_xe:15.5\(3\)s:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.7.1
cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.9.1
cpe:2.3:o:cisco:ios_xe:16.9.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 15.6(1)s
cpe:2.3:o:cisco:ios_xe:15.6\(1\)s:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.12.1
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.10.1
cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A
Cisco » Ios Xe » Version: 16.11.1
cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4p » Version: N/A
When used together with: Cisco » 1100-8p » Version: N/A
When used together with: Cisco » 1101-4p » Version: N/A
When used together with: Cisco » 1109-2p » Version: N/A
When used together with: Cisco » 1109-4p » Version: N/A
When used together with: Cisco » 1111x-8p » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A
When used together with: Cisco » Encs 5100 » Version: N/A
When used together with: Cisco » Encs 5400 » Version: N/A
When used together with: Cisco » Isrv » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2019-12646

EPSS FAQ

1.03%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 75 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-12646

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:N/I:N/A:C	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
8.6	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2019-12646

CWE-399

Assigned by: ykramarz@cisco.com (Secondary)
CWE-665 Improper Initialization

The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-12646

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-sip-alg

Cisco IOS XE Software NAT Session Initiation Protocol Application Layer Gateway Denial of Service Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2019-12646

Products affected by CVE-2019-12646

Exploit prediction scoring system (EPSS) score for CVE-2019-12646

CVSS scores for CVE-2019-12646

CWE ids for CVE-2019-12646

References for CVE-2019-12646