Mozilla Firefox up to 2.0 stack-based overflow ⚔ [Disputed]

Summaryinfo

A vulnerability classified as critical was found in Mozilla Firefox. Impacted is an unknown function. Executing a manipulation can lead to stack-based overflow. This vulnerability is registered as CVE-2006-5159. It is possible to launch the attack remotely. No exploit is available. It is still unclear if this vulnerability genuinely exists.

Detailsinfo

A vulnerability has been found in Mozilla Firefox (Web Browser) and classified as critical. This vulnerability affects an unknown function. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in Mozilla Firefox allows remote attackers to execute arbitrary code via unspecified vectors involving JavaScript. NOTE: the vendor and original researchers have released a follow-up comment disputing the severity of this issue, in which the researcher states that "we mentioned that there was a previously known Firefox vulnerability that could result in a stack overflow ending up in remote code execution. However, the code we presented did not in fact do this... I have not succeeded in making this code do anything more than cause a crash and eat up system resources"

The weakness was published 10/05/2006 by Andrew (Website). The advisory is shared for download at securitypronews.com. This vulnerability was named CVE-2006-5159 since 10/03/2006. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 04/23/2026).

The real existence of this vulnerability is still doubted at the moment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115423 (Mozilla Firefox Unspecified JavaScript Remote Code Execution Vulnerability - Zero Day).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (29317), SecurityFocus (BID 20294†) and SecurityTracker (ID 1016962†). Similar entry is available at VDB-32621. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 0.8
• 0.9
• 0.9.1
• 0.9.2
• 0.9.3
• 0.10
• 0.10.1
• 1.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.5
• 1.5.0.1
• 1.5.0.2
• 1.5.3
• 1.5.4
• 1.5.5
• 1.5.6
• 1.5.7
• 1.5.8
• 2.0

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion