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CVE-2019-12647 Details

Description

A vulnerability in the Ident protocol handler of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability exists because the affected software incorrectly handles memory structures, leading to a NULL pointer dereference. An attacker could exploit this vulnerability by opening a TCP connection to specific ports and sending traffic over that connection. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-identd-dos	CVE	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-identd-dos	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	[email protected]
CWE-476	NULL Pointer Dereference	[email protected]

Affected Products

Product	Versions
cisco ios xe	fuji-16.7.1 fuji-16.8.1
CPE cpe:2.3:o:cisco:ios_xe:fuji-16.7.1:::::::* cpe:2.3:o:cisco:ios_xe:fuji-16.8.1:::::::* Remediation No remediation found in references.
cisco 1100	All versions
CPE cpe:2.3:h:cisco:1100:-:::::::* Remediation No remediation found in references.
cisco 4221	All versions
CPE cpe:2.3:h:cisco:4221:-:::::::* Remediation No remediation found in references.
cisco 4321	All versions
CPE cpe:2.3:h:cisco:4321:-:::::::* Remediation No remediation found in references.
cisco 4351	All versions
CPE cpe:2.3:h:cisco:4351:-:::::::* Remediation No remediation found in references.
cisco 4431	All versions
CPE cpe:2.3:h:cisco:4431:-:::::::* Remediation No remediation found in references.
cisco 4451-x	All versions
CPE cpe:2.3:h:cisco:4451-x:-:::::::* Remediation No remediation found in references.
cisco asr 1000	All versions
CPE cpe:2.3:h:cisco:asr_1000:-:::::::* Remediation No remediation found in references.
cisco asr 1001-hx	All versions
CPE cpe:2.3:h:cisco:asr_1001-hx:-:::::::* Remediation No remediation found in references.
cisco asr 1001-x	All versions
CPE cpe:2.3:h:cisco:asr_1001-x:-:::::::* Remediation No remediation found in references.
cisco asr 1002-hx	All versions
CPE cpe:2.3:h:cisco:asr_1002-hx:-:::::::* Remediation No remediation found in references.
cisco asr 1002-x	All versions
CPE cpe:2.3:h:cisco:asr_1002-x:-:::::::* Remediation No remediation found in references.
cisco asr 900	All versions
CPE cpe:2.3:h:cisco:asr_900:-:::::::* Remediation No remediation found in references.
cisco asr 920-10sz-pd	All versions
CPE cpe:2.3:h:cisco:asr_920-10sz-pd:-:::::::* Remediation No remediation found in references.
cisco asr 920-12cz-a	All versions
CPE cpe:2.3:h:cisco:asr_920-12cz-a:-:::::::* Remediation No remediation found in references.
cisco asr 920-12cz-d	All versions
CPE cpe:2.3:h:cisco:asr_920-12cz-d:-:::::::* Remediation No remediation found in references.
cisco asr 920-12sz-im	All versions
CPE cpe:2.3:h:cisco:asr_920-12sz-im:-:::::::* Remediation No remediation found in references.
cisco asr 920-24sz-im	All versions
CPE cpe:2.3:h:cisco:asr_920-24sz-im:-:::::::* Remediation No remediation found in references.
cisco asr 920-24sz-m	All versions
CPE cpe:2.3:h:cisco:asr_920-24sz-m:-:::::::* Remediation No remediation found in references.
cisco asr 920-24tz-m	All versions
CPE cpe:2.3:h:cisco:asr_920-24tz-m:-:::::::* Remediation No remediation found in references.
cisco asr 920-4sz-a	All versions
CPE cpe:2.3:h:cisco:asr_920-4sz-a:-:::::::* Remediation No remediation found in references.
cisco asr 920-4sz-d	All versions
CPE cpe:2.3:h:cisco:asr_920-4sz-d:-:::::::* Remediation No remediation found in references.
cisco cloud services router 1000v	All versions
CPE cpe:2.3:h:cisco:cloud_services_router_1000v:-:::::::* Remediation No remediation found in references.
cisco ncs 4201	All versions
CPE cpe:2.3:h:cisco:ncs_4201:-:::::::* Remediation No remediation found in references.
cisco ncs 4202	All versions
CPE cpe:2.3:h:cisco:ncs_4202:-:::::::* Remediation No remediation found in references.
cisco ncs 4206	All versions
CPE cpe:2.3:h:cisco:ncs_4206:-:::::::* Remediation No remediation found in references.
cisco ncs 4216	All versions
CPE cpe:2.3:h:cisco:ncs_4216:-:::::::* Remediation No remediation found in references.
cisco network convergence system 520	All versions
CPE cpe:2.3:h:cisco:network_convergence_system_520:-:::::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 9, 2019	CVE Modified	[email protected]
Oct 2, 2019	Initial Analysis	[email protected]

CVE-2019-12647 Details

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