Cisco CatOS up to 4.5(13a)/5.5(13)/6.3(4)/7.1(2) memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Cisco CatOS up to 4.5(13a)/5.5(13)/6.3(4)/7.1(2). This affects an unknown function. Executing a manipulation can lead to memory corruption. This vulnerability is tracked as CVE-2001-0554. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Cisco CatOS up to 4.5(13a)/5.5(13)/6.3(4)/7.1(2) and classified as critical. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a set of options including AYT (Are You There), which is not properly handled by the telrcv function.

The weakness was disclosed 01/01/2002 (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2001-0554. 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 a public exploit is available.

A public exploit has been developed in ANSI C. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 10986 (Cisco CatOS Telnet Option Handling Overflow (CSCdw19195)), 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. Attack attempts may be identified with Snort ID 1252.

The vulnerability is also documented in the databases at Exploit-DB (21018), Tenable (10986), SecurityFocus (BID 3064†), OSVDB (809†) and Vulnerability Center (SBV-2091†). The entry VDB-17165 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10986
Nessus Name: Cisco CatOS Telnet Option Handling Overflow (CSCdw19195)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860233
OpenVAS Name: TESO in.telnetd buffer overflow
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Snort ID: 1252
Snort Message: PROTOCOL-TELNET bsd telnet exploit response
Snort Class: 🔍

Timelineinfo

07/18/2001 🔍
08/14/2001 +27 days 🔍
01/01/2002 +140 days 🔍
01/01/2002 +0 days 🔍
06/05/2002 +155 days 🔍
09/11/2003 +463 days 🔍
07/01/2016 +4677 days 🔍
01/21/2025 +3126 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-2001-0554 (🔍)
GCVE (CVE): GCVE-0-2001-0554
GCVE (VulDB): GCVE-100-88492

OVAL: 🔍

X-Force: 6875
SecurityFocus: 3064 - Multiple Vendor Telnetd Buffer Overflow Vulnerability
OSVDB: 809
Vulnerability Center: 2091 - Buffer Overflow in Cisco Catalyst Switches Running Certain Cisco CatOS, High

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

Entryinfo

Created: 07/01/2016 17:47
Updated: 01/21/2025 05:13
Changes: 07/01/2016 17:47 (57), 02/15/2019 12:54 (19), 08/26/2022 09:13 (2), 01/21/2025 05:13 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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