Cisco IOS up to 12.3 IPv4 Stack memory leak

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Cisco IOS up to 12.3. This affects an unknown function of the component IPv4 Stack. The manipulation leads to memory leak. This vulnerability is traded as CVE-2007-0479. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS up to 12.3 (Router Operating System). It has been rated as critical. This issue affects some unknown functionality of the component IPv4 Stack. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

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 shared 01/25/2007 with Cisco (Website). It is possible to read the advisory at cisco.com. The identification of this vulnerability is CVE-2007-0479 since 01/24/2007. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $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. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (31716), Tenable (24744), SecurityFocus (BID 22208†), OSVDB (32093†) and Secunia (SA23867†). The entries VDB-2881, VDB-2880, VDB-34599 and VDB-34598 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

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: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / 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: 🔍

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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: 🔍

0-Day Time: 🔍

Patch: cisco.com

Timelineinfo

01/24/2007 🔍
01/24/2007 +0 days 🔍
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 🔍
01/25/2007 +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-100-2879

OVAL: 🔍

CERT: 🔍
X-Force: 31716 - Cisco IOS TCP listener IPv4 memory leak denial of service, Medium Risk
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
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 (84), 04/24/2019 16:33 (5), 12/18/2024 03:04 (17), 06/14/2025 01:52 (2)
Complete: 🔍
Cache ID: 216:CF1:103

Be aware that VulDB is the high quality source for vulnerability data.

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