Cisco CBOS up to 2.4.4 TCP/IP Stack memory allocation

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco CBOS. This issue affects some unknown processing of the component TCP/IP Stack. Performing a manipulation results in memory allocation. This vulnerability is known as CVE-2002-0886. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Cisco CBOS. It has been classified as problematic. This affects some unknown functionality of the component TCP/IP Stack. The manipulation with an unknown input leads to a memory allocation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

Cisco DSL CPE devices running CBOS 2.4.4 and earlier allows remote attackers to cause a denial of service (hang or memory consumption) via (1) a large packet to the DHCP port, (2) a large packet to the Telnet port, or (3) a flood of large packets to the CPE, which causes the TCP/IP stack to consume large amounts of memory.

The weakness was published 10/04/2002 by Knud Erik Højgaard (Website). The advisory is shared at cisco.com. This vulnerability is uniquely identified as CVE-2002-0886. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 2745.

The vulnerability is also documented in the databases at X-Force (9151), Exploit-DB (21472), SecurityFocus (BID 4813†) and Vulnerability Center (SBV-11207†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
TippingPoint: 🔍

Timelineinfo

05/23/2002 🔍
05/23/2002 +0 days 🔍
10/04/2002 +134 days 🔍
10/04/2002 +0 days 🔍
04/24/2006 +1297 days 🔍
07/23/2014 +3012 days 🔍
09/06/2024 +3698 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: Knud Erik Højgaard
Status: Not defined

CVE: CVE-2002-0886 (🔍)
GCVE (CVE): GCVE-0-2002-0886
GCVE (VulDB): GCVE-100-18825
X-Force: 9151
SecurityFocus: 4813 - Cisco CBOS Oversized Packet DHCP Denial Of Service Vulnerability
Vulnerability Center: 11207 - [cisco-sa-20020523-cbos-dos] Cisco CBOS DoS via DHCP Port, High

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

Entryinfo

Created: 07/23/2014 11:37
Updated: 09/06/2024 07:46
Changes: 07/23/2014 11:37 (55), 09/28/2018 09:28 (3), 09/06/2024 07:46 (25)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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