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.
7.5	$0-$5k	0.00

A vulnerability classified as critical was found in Cisco IOS (Router Operating System). This vulnerability affects some unknown functionality. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. CVE summarizes:

Unspecified vulnerability in Cisco IOS 12.2 and 12.4, when SSLVPN sessions, SSH sessions, or IKE encrypted nonces are enabled, allows remote attackers to cause a denial of service (device reload) via a crafted encrypted packet, aka Bug ID CSCsq24002.

The weakness was presented 09/28/2009 with Cisco (Website). The advisory is shared for download at vupen.com. This vulnerability was named CVE-2009-2871. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/23/2021).

The vulnerability scanner Nessus provides a plugin with the ID 49047 (Cisco IOS Software Crafted Encryption Packet Denial of Service Vulnerability - Cisco Systems), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (49047).

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS

Version

• 12.2xna
• 12.2xnb
• 12.2xnc
• 12.2xnd
• 12.4md
• 12.4mr
• 12.4sw
• 12.4t
• 12.4xf
• 12.4xj
• 12.4xk
• 12.4xq
• 12.4xr
• 12.4xv
• 12.4xw
• 12.4xy
• 12.4xz

License

• commercial

Support

• end of life (old version)

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
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
CAPEC: 🔍
ATT&CK: 🔍

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: 49047
Nessus Name: Cisco IOS Software Crafted Encryption Packet Denial of Service Vulnerability - Cisco Systems
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/19/2009 🔍
09/23/2009 +35 days 🔍
09/23/2009 +0 days 🔍
09/24/2009 +1 days 🔍
09/28/2009 +4 days 🔍
09/28/2009 +0 days 🔍
09/01/2010 +338 days 🔍
03/18/2015 +1659 days 🔍
08/23/2021 +2350 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: vupen.com⛔
Organization: Cisco
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-2871 (🔍)
Vulnerability Center: 23560 - [cisco-sa-20090923-tls] Cisco IOS Specially Crafted Encryption Packet Remote DoS Vulnerability, High
SecurityFocus: 36493 - Cisco IOS Specially Crafted Encryption Packet Denial of Service Vulnerability

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/23/2021 09:52
Changes: 03/18/2015 15:15 (54), 02/15/2017 09:17 (9), 08/23/2021 09:48 (4), 08/23/2021 09:52 (1)
Complete: 🔍
Cache ID: 18:F39:103

Discussion

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