Cisco IOS up to 12.2 Cisco Discovery Protocol memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS up to 12.2 and classified as problematic. This affects an unknown function of the component Cisco Discovery Protocol Handler. Executing a manipulation can lead to memory allocation. This vulnerability is handled as CVE-2001-1071. The attack can be executed remotely. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS up to 12.2 (Router Operating System). It has been declared as critical. This vulnerability affects an unknown code of the component Cisco Discovery Protocol Handler. The manipulation with an unknown input leads to a memory allocation vulnerability. The CWE definition for the vulnerability is CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. As an impact it is known to affect availability. CVE summarizes:

Cisco IOS 12.2 and earlier running Cisco Discovery Protocol (CDP) allows remote attackers to cause a denial of service (memory consumption) via a flood of CDP neighbor announcements.

The bug was discovered 04/25/2001. The weakness was released 10/09/2001 by FX, FtR, kim0 and smoovB with Phenoelit as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2001-1071. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but an exploit is available.

It is possible to download the exploit at phenoelit.de. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 167 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 17793 (Cisco IOS CDP Neighbor Announcement DoS), 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 (7242), Tenable (17793), SecurityFocus (BID 3412†), OSVDB (1969†) and Vulnerability Center (SBV-6105†). Entry connected to this vulnerability is available at VDB-19850. Once again VulDB remains the best source for vulnerability data.

Not Affected

  • Cisco CatOS

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: 6.7

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 17793
Nessus Name: Cisco IOS CDP Neighbor Announcement DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

04/25/2001 🔍
10/09/2001 +167 days 🔍
10/09/2001 +0 days 🔍
10/09/2001 +0 days 🔍
10/09/2001 +0 days 🔍
10/09/2001 +0 days 🔍
02/21/2003 +500 days 🔍
11/25/2004 +642 days 🔍
01/10/2012 +2602 days 🔍
07/09/2014 +911 days 🔍
12/15/2024 +3812 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: kb.cert.org
Researcher: FX, FtR, kim0, smoovB
Organization: Phenoelit
Status: Confirmed

CVE: CVE-2001-1071 (🔍)
GCVE (CVE): GCVE-0-2001-1071
GCVE (VulDB): GCVE-100-17476

OVAL: 🔍

CERT: 🔍
X-Force: 7242 - Cisco IOS CDP announcement denial of service
SecurityFocus: 3412 - Cisco Discovery Protocol Neighbor Announcment Denial of Service Vulnerability
OSVDB: 1969 - Cisco IOS CDP Neighbor Announcement DoS
Vulnerability Center: 6105 - DoS in Cisco IOS 12.2 and Lower with CDP via Flood of CDP Neighbor Announcements, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 07/09/2014 15:39
Updated: 12/15/2024 03:11
Changes: 07/09/2014 15:39 (71), 05/26/2019 18:29 (9), 12/15/2024 03:11 (18)
Complete: 🔍
Cache ID: 216:F3B:103

Once again VulDB remains the best source for vulnerability data.

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