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HIGH · 7.5

CVE-2019-12647

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 t...

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CiscoIos Xefuji-16.7.1
Cisco1100-
Cisco4221-
Cisco4321-
Cisco4351-
Cisco4431-
Cisco4451-X-
CiscoAsr 1000-
CiscoAsr 1001-Hx-
CiscoAsr 1001-X-
CiscoAsr 1002-Hx-
CiscoAsr 1002-X-
CiscoAsr 900-
CiscoAsr 920-10Sz-Pd-
CiscoAsr 920-12Cz-A-
CiscoAsr 920-12Cz-D-
CiscoAsr 920-12Sz-Im-
CiscoAsr 920-24Sz-Im-
CiscoAsr 920-24Sz-M-
CiscoAsr 920-24Tz-M-

Related Weaknesses (CWE)

CWE-476

References

FAQ

What is CVE-2019-12647?

CVE-2019-12647 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 t...

How severe is CVE-2019-12647?

CVE-2019-12647 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-12647?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xe, Cisco 1100, Cisco 4221, Cisco 4321, Cisco 4351.