Cisco IOS up to 12.3 TCP Segment denial of service

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.
6.7$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Cisco IOS up to 12.3. This impacts an unknown function of the component TCP Segment Handler. The manipulation results in denial of service. This vulnerability is known as CVE-2007-0479. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Cisco IOS up to 12.3 (Router Operating System). Affected is an unknown part of the component TCP Segment Handler. The manipulation with an unknown input 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. CVE summarizes:

Memory leak in the TCP listener in Cisco IOS 9.x, 10.x, 11.x, and 12.x allows remote attackers to cause a denial of service by sending crafted TCP traffic to an IPv4 address on the IOS device.

The weakness was published 01/25/2007 with Cisco (Website). The advisory is shared for download at cisco.com. This vulnerability is traded as CVE-2007-0479 since 01/24/2007. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 24744 (Cisco IOS TCP Listener Crafted Packets Remote DoS (CSCek37177)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO, running in the context l and relying on port 161. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43133 (Cisco IOS TCP Listener Memory Leak Can Cause Denial of Service (cisco-sa-20070124-crafted-tcp)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at cisco.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (31716), Tenable (24744), SecurityFocus (BID 22208†), OSVDB (32093†) and Secunia (SA23867†). Similar entries are available at VDB-2881, VDB-2879, VDB-34599 and VDB-34598. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 24744
Nessus Name: Cisco IOS TCP Listener Crafted Packets Remote DoS (CSCek37177)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Patch: cisco.com

Timelineinfo

01/24/2007 🔍
01/24/2007 +0 days 🔍
01/24/2007 +0 days 🔍
01/24/2007 +0 days 🔍
01/25/2007 +1 days 🔍
01/25/2007 +0 days 🔍
01/26/2007 +0 days 🔍
03/01/2007 +34 days 🔍
06/14/2025 +6679 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: http://www.cisco.com
Organization: Cisco
Status: Confirmed

CVE: CVE-2007-0479 (🔍)
GCVE (CVE): GCVE-0-2007-0479
GCVE (VulDB): GCVE-100-2880

OVAL: 🔍

X-Force: 31716
SecurityFocus: 22208 - Cisco IOS TCP Listener Denial Of Service Vulnerability
Secunia: 23867 - Cisco IOS Multiple Vulnerabilities, Highly Critical
OSVDB: 32093 - Cisco IOS Listener Crafted TCP Packets DoS
SecurityTracker: 1017551
SecuriTeam: securiteam.com
Vupen: ADV-2007-0329

See also: 🔍

Entryinfo

Created: 01/26/2007 14:01
Updated: 06/14/2025 01:52
Changes: 01/26/2007 14:01 (75), 04/24/2019 06:50 (10), 06/14/2025 01:52 (18)
Complete: 🔍
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!