VDB-135117 · CVE-2019-1806 · BID 108335

Cisco Small Business ESW2 SNMP Packet Processor resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco Small Business Sx200, Small Business Sx250, Small Business Sx300, Small Business Sx350, Small Business Sx500, Small Business Sx550 and Small Business ESW2 and classified as problematic. This issue affects some unknown processing of the component SNMP Packet Processor. Performing a manipulation as part of SNMP Packet results in resource consumption. This vulnerability is reported as CVE-2019-1806. The attack is possible to be carried out remotely. No exploit exists. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco Small Business Sx200, Small Business Sx250, Small Business Sx300, Small Business Sx350, Small Business Sx500, Small Business Sx550 and Small Business ESW2. This affects an unknown part of the component SNMP Packet Processor. The manipulation as part of a SNMP Packet leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches and Small Business Sx250, Sx350, Sx550 Series Switches could allow an authenticated, remote attacker to cause the SNMP application of an affected device to cease processing traffic, resulting in the CPU utilization reaching one hundred percent. Manual intervention may be required before a device resumes normal operations. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a malicious SNMP packet to an affected device. A successful exploit could allow the attacker to cause the device to cease forwarding traffic, which could result in a denial of service (DoS) condition. Cisco has released firmware updates that address this vulnerability.

The bug was discovered 05/15/2019. The weakness was disclosed 05/15/2019 as cisco-sa-20190515-sb-snmpdos as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is uniquely identified as CVE-2019-1806 since 12/06/2018. It is possible to initiate the attack remotely. A authentication is necessary for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

It is possible to mitigate the weakness by firewalling udp/161 (snmp).

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Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 7.7
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / 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: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Timelineinfo

12/06/2018 🔍
05/15/2019 +160 days 🔍
05/15/2019 +0 days 🔍
05/16/2019 +1 days 🔍
09/21/2023 +1589 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190515-sb-snmpdos
Status: Confirmed

CVE: CVE-2019-1806 (🔍)
GCVE (CVE): GCVE-0-2019-1806
GCVE (VulDB): GCVE-100-135117
SecurityFocus: 108335

Entryinfo

Created: 05/16/2019 08:38
Updated: 09/21/2023 10:01
Changes: 05/16/2019 08:38 (58), 06/12/2020 20:53 (1), 09/21/2023 09:57 (3), 09/21/2023 10:01 (12)
Complete: 🔍
Cache ID: 216::103

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