Mozilla Firefox 1.0 Form AutoComplete information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability, which was classified as critical, was found in Mozilla Firefox 1.0 (Web Browser). Affected is the function AutoComplete of the component Form Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

String handling functions in Mozilla 1.7.3, Firefox 1.0, and Thunderbird before 1.0.2, such as the nsTSubstring_CharT::Replace function, do not properly check the return values of other functions that resize the string, which allows remote attackers to cause a denial of service and possibly execute arbitrary code by forcing an out-of-memory state that causes a reallocation to fail and return a pointer to a fixed address, which leads to heap corruption.

The weakness was shared 03/01/2005 by Matt Brubeck (taviso) with Mozilla as MFSA2005-19 as not defined advisory (Website). The advisory is available at This vulnerability is traded as CVE-2005-0255 since 02/09/2005. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/10/2021). This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 17270 (RHEL 4 : mozilla (RHSA-2005:277)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at The problem might be mitigated by replacing the product with as an alternative. The best possible mitigation is suggested to be establishing an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (17270).







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
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Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 17270
Nessus Name: RHEL 4 : mozilla (RHSA-2005:277)
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OpenVAS ID: 54875
OpenVAS Name: Gentoo Security Advisory GLSA 200503-10 (Firefox)
OpenVAS File: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Alternative
Status: 🔍

0-Day Time: 🔍



02/09/2005 🔍
02/25/2005 +16 days 🔍
03/01/2005 +4 days 🔍
03/04/2005 +3 days 🔍
03/08/2005 +4 days 🔍
05/02/2005 +55 days 🔍
03/10/2021 +5791 days 🔍



Advisory: MFSA2005-19
Researcher: Matt Brubeck (taviso)
Organization: Mozilla
Status: Not defined
Confirmation: 🔍

CVE: CVE-2005-0255 (🔍)

SecurityFocus: 12659 - Mozilla Suite Multiple Remote Vulnerabilities
Secunia: 14407 - Mozilla / Firefox / Thunderbird Multiple Vulnerabilities, Moderately Critical


Created: 03/08/2005 12:03 PM
Updated: 03/10/2021 04:51 PM
Changes: 03/08/2005 12:03 PM (69), 09/29/2016 05:19 PM (6), 03/10/2021 04:46 PM (8), 03/10/2021 04:51 PM (1)
Complete: 🔍
Cache ID: 34:80D:40


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