Cisco IOS 12.0 Fragmentation denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

A vulnerability classified as problematic has been found in Cisco IOS 12.0 (Router Operating System). This affects an unknown code of the component Fragmentation 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. The summary by CVE is:

Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not handle the "fragment" keyword in a compiled ACL (Turbo ACL) for packets that are sent to the router, which allows remote attackers to cause a denial of service via a flood of fragments.

The bug was discovered 11/14/2001. The weakness was released 11/14/2001 by FIRST with Cisco (Website). The advisory is shared at cisco.com. This vulnerability is uniquely identified as CVE-2001-0863. The exploitability is told to be easy. 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 48959 (Multiple Vulnerabilities in Access Control List Implementation for Cisco 12000 Series Internet Router - Cisco Systems), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l.

Upgrading 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 (7551) and Tenable (48959). Entries connected to this vulnerability are available at 17720, 17722, 17723 and 17724.

Productinfo

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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: 5.3
VulDB Meta Temp Score: 5.1

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

CVSSv2info

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VulDB Base Score: 🔍
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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: 🔍

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Nessus ID: 48959
Nessus Name: Multiple Vulnerabilities in Access Control List Implementation for Cisco 12000 Series Internet Router - Cisco Systems
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

11/14/2001 🔍
11/14/2001 +0 days 🔍
11/14/2001 +0 days 🔍
11/14/2001 +0 days 🔍
11/14/2001 +0 days 🔍
12/06/2001 +22 days 🔍
02/21/2003 +442 days 🔍
01/13/2004 +325 days 🔍
09/01/2010 +2423 days 🔍
07/11/2014 +1409 days 🔍
05/19/2019 +1773 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: FIRST
Organization: Cisco
Status: Not defined

CVE: CVE-2001-0863 (🔍)
OVAL: 🔍

X-Force: 7551 - Cisco allows fragmented packets in outgoing ACL
Vulnerability Center: 3433 - [cisco-sa-20011114-gsr-acl] DoS in Cisco 12000 with IOS 12.0 via \x27Fragment\x27 Keyword in ACL, Medium
SecurityFocus: 3539 - Cisco Fragment Keyword Outgoing Access Control Vulnerability
OSVDB: 1987 - Cisco 12000 Series Router Fragment Keyword Ignored in Outbound ACL

See also: 🔍

Entryinfo

Created: 07/11/2014 10:49
Updated: 05/19/2019 11:25
Changes: 07/11/2014 10:49 (75), 05/19/2019 11:25 (1)
Complete: 🔍

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