Cisco IOS up to 12.4xz denial of service

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2009-2871. There is no available exploit.

Detailsinfo

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 $0-$5k (estimation calculated on 03/27/2025).

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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43167 (Cisco IOS Software Crafted Encryption Packet Denial of Service Vulnerability (cisco-sa-20090923-tls)).

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 databases at Tenable (49047), SecurityFocus (BID 36493†) and Vulnerability Center (SBV-23560†). See VDB-50249, VDB-50247, VDB-50246 and VDB-50245 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: 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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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: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

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 🔍
03/27/2025 +3662 days 🔍

Sourcesinfo

Vendor: cisco.com

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

CVE: CVE-2009-2871 (🔍)
GCVE (CVE): GCVE-0-2009-2871
GCVE (VulDB): GCVE-100-50248
SecurityFocus: 36493 - Cisco IOS Specially Crafted Encryption Packet Denial of Service Vulnerability
Vulnerability Center: 23560 - [cisco-sa-20090923-tls] Cisco IOS Specially Crafted Encryption Packet Remote DoS Vulnerability, High

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 03/27/2025 08:12
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), 03/27/2025 08:12 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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