CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

A vulnerability classified as problematic has been found in Cisco IOS (Router Operating System). This affects an unknown part of the component DHCP Server. The manipulation as part of a Lease leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The remember feature in the DHCP server in Cisco IOS allows remote attackers to cause a denial of service (device reload) by acquiring a lease and then sending a DHCPRELEASE message, aka Bug ID CSCuh46822.

The weakness was shared 10/07/2013 as CSCuh46822 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. The vendor cooperated in the coordination of the public release. This vulnerability is uniquely identified as CVE-2013-5499 since 08/22/2013. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 78064 (Cisco IOS DHCP Remember Functionality DoS (CSCuh46822)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.

Upgrading to version 15.4(0.5)T eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (87721) and Tenable (78064).

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

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

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 78064
Nessus Name: Cisco IOS DHCP Remember Functionality DoS (CSCuh46822)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: IOS 15.4(0.5)T

Timelineinfo

08/22/2013 🔍
10/07/2013 +45 days 🔍
10/07/2013 +0 days 🔍
10/07/2013 +0 days 🔍
10/07/2013 +0 days 🔍
10/08/2013 +1 days 🔍
10/09/2013 +1 days 🔍
10/09/2013 +0 days 🔍
10/10/2013 +1 days 🔍
10/06/2014 +361 days 🔍
05/26/2021 +2424 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCuh46822
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-5499 (🔍)
X-Force: 87721
Vulnerability Center: 41839 - Cisco IOS DHCP Server Remote DoS Vulnerability via \x27Remember\x27 Functionality, High
SecurityFocus: 62866
Secunia: 55204 - Cisco IOS DHCP "remember" Denial of Service Vulnerability, Less Critical
OSVDB: 98165

Entryinfo

Created: 10/09/2013 14:59
Updated: 05/26/2021 12:39
Changes: 10/09/2013 14:59 (72), 05/13/2017 09:38 (2), 05/26/2021 12:32 (4), 05/26/2021 12:39 (1)
Complete: 🔍
Committer:

Discussion

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