Cisco IOS/IOS XE Ident Protocol TCP Connection null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco IOS and IOS XE and classified as problematic. This affects an unknown function of the component Ident Protocol Handler. The manipulation as part of TCP Connection leads to null pointer dereference. This vulnerability is documented as CVE-2019-12647. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco IOS and IOS XE (Router Operating System) (the affected version unknown). It has been rated as problematic. This issue affects an unknown part of the component Ident Protocol Handler. The manipulation as part of a TCP Connection leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

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.

The weakness was released 09/25/2019 as cisco-sa-20190925-identd-dos as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2019-12647 since 06/04/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/04/2019 🔍
09/25/2019 +113 days 🔍
09/26/2019 +1 days 🔍
12/28/2023 +1554 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190925-identd-dos
Status: Confirmed

CVE: CVE-2019-12647 (🔍)
GCVE (CVE): GCVE-0-2019-12647
GCVE (VulDB): GCVE-100-142271
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 09/26/2019 12:31
Updated: 12/28/2023 08:37
Changes: 09/26/2019 12:31 (40), 09/08/2020 20:56 (18), 12/28/2023 08:37 (14)
Complete: 🔍
Cache ID: 216::103

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