Cisco IOS up to 12.2 Account cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco IOS up to 12.2. It has been classified as critical. This vulnerability affects unknown code of the component Account Handler. Performing a manipulation results in cryptographic issue. This vulnerability is identified as CVE-2003-0512. The attack can be initiated remotely. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS up to 12.2 (Router Operating System). This affects an unknown code block of the component Account Handler. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality.

The weakness was released 07/28/2003 by Réda Zitouni with VIGILANTe (Website). The advisory is shared at cisco.com. This vulnerability is uniquely identified as CVE-2003-0512 since 07/07/2003. 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. MITRE ATT&CK project uses the attack technique T1600 for this issue.

The exploit is shared for download at securityfocus.com. 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 17786 (Cisco IOS Locally Defined User Enumeration), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43052 (Cisco Aironet Telnet Service User Account Enumeration Weakness).

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.

The vulnerability is also documented in the databases at X-Force (12745), Tenable (17786), SecurityFocus (BID 8292†), OSVDB (2341†) and Secunia (SA9396†). Further details are available at cisco.com. Entry connected to this vulnerability is available at VDB-213. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.7
VulDB Temp Score: 3.4
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: Cryptographic issue
CWE: CWE-310
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: 17786
Nessus Name: Cisco IOS Locally Defined User Enumeration
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
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

07/07/2003 🔍
07/28/2003 +21 days 🔍
07/28/2003 +0 days 🔍
07/29/2003 +1 days 🔍
07/31/2003 +2 days 🔍
08/27/2003 +26 days 🔍
08/27/2003 +0 days 🔍
06/10/2004 +288 days 🔍
01/10/2012 +2770 days 🔍
08/12/2025 +4963 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco.com
Researcher: Réda Zitouni
Organization: VIGILANTe
Status: Confirmed

CVE: CVE-2003-0512 (🔍)
GCVE (CVE): GCVE-0-2003-0512
GCVE (VulDB): GCVE-100-201

OVAL: 🔍

CERT: 🔍
X-Force: 12745 - Cisco IOS could allow an attacker to determine valid accounts, Medium Risk
SecurityFocus: 8292 - Cisco Aironet Telnet Service User Account Enumeration Weakness
Secunia: 9396 - Cisco IOS User Enumeration, Less Critical
OSVDB: 2341 - Cisco IOS Valid Username Enumeration
Vulnerability Center: 4450 - [cisco-sn-20030724-ios-enum] Cisco IOS <= 12.2 Allows Brute Force Attack, High

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

Entryinfo

Created: 07/29/2003 11:38
Updated: 08/12/2025 11:12
Changes: 07/29/2003 11:38 (86), 06/07/2017 16:08 (6), 03/08/2021 15:15 (2), 03/08/2021 15:21 (1), 12/15/2024 22:41 (17), 08/12/2025 11:12 (2)
Complete: 🔍
Cache ID: 216::103

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

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