Mozilla Firefox before 3.0.19, 3.5.x before 3.5.9, and 3.6.x before 3.6.2, and SeaMonkey before 2.0.4, does not prevent applets from interpreting mouse clicks as drag-and-drop actions, which allows remote attackers to execute arbitrary JavaScript with Chrome privileges by loading a chrome: URL and then loading a javascript: URL.

Mozilla based browsers, including Firefox before 1.5.0.10 and 2.x before 2.0.0.2, and SeaMonkey before 1.0.8, allow remote attackers to bypass the same origin policy, steal cookies, and conduct other attacks by writing a URI with a null byte to the hostname (location.hostname) DOM property, due to interactions with DNS resolver code.

Use-after-free vulnerability in the LiveConnect bridge code for Mozilla Firefox 2.x before 2.0.0.1, 1.5.x before 1.5.0.9, Thunderbird before 1.5.0.9, and SeaMonkey before 1.0.7 allows remote attackers to cause a denial of service (crash) via unknown vectors.

Unspecified vulnerability in Mozilla Firefox before 1.5.0.8, Thunderbird before 1.5.0.8, and SeaMonkey before 1.0.6 allows remote attackers to execute arbitrary JavaScript bytecode via unspecified vectors involving modification of a Script object while it is executing.

Unspecified vulnerability in Mozilla Firefox before 1.5.0.8, Thunderbird before 1.5.0.8, and SeaMonkey before 1.0.6 allows remote attackers to execute arbitrary code via the XML.prototype.hasOwnProperty JavaScript function.

DISPUTED Multiple unspecified vulnerabilities in Mozilla Firefox have unspecified vectors and impact, as claimed during ToorCon 2006. NOTE: the vendor and original researchers have released a follow-up comment disputing this issue, in which one researcher states that "I have no undisclosed Firefox vulnerabilities. The person who was speaking with me made this claim, and I honestly have no idea if he has them or not."

DISPUTED 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".

Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple Javascript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, which leads to a concurrency failure that causes structures to be freed incorrectly, as demonstrated by (1) ffoxdie and (2) ffoxdie3. NOTE: it has been reported that Netscape 8.1 and K-Meleon 1.0.1 are also affected by ffoxdie. Mozilla confirmed to CVE that ffoxdie and ffoxdie3 trigger the same underlying vulnerability. NOTE: it was later reported that Firefox 2.0 RC2 and 1.5.0.7 are also affected.

Double free vulnerability in the getRawDER function for nsIX509Cert in Firefox allows remote attackers to cause a denial of service (hang) and possibly execute arbitrary code via certain Javascript code.

Certain privileged UI code in Mozilla Firefox and Thunderbird before 1.5.0.4 calls content-defined setters on an object prototype, which allows remote attackers to execute code at a higher privilege than intended.

Unspecified vulnerability in Mozilla Firefox before 1.5.0.4 and SeaMonkey before 1.0.2 allows remote attackers to execute arbitrary code by using the nsISelectionPrivate interface of the Selection object to add a SelectionListener and create notifications that are executed in a privileged context.

Mozilla Firefox and Thunderbird before 1.5.0.4 associates XUL attributes with the wrong URL under certain unspecified circumstances, which might allow remote attackers to bypass restrictions by causing a persisted string to be associated with the wrong URL.

Unspecified vulnerability in Firefox and Thunderbird before 1.5.0.2, and SeaMonkey before 1.0.1, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown attack vectors related to DHTML. NOTE: due to the lack of sufficient public details from the vendor as of 20060413, it is unclear how CVE-2006-1529, CVE-2006-1530, CVE-2006-1531, and CVE-2006-1723 are different.

Unspecified vulnerability in Firefox and Thunderbird before 1.5.0.2, and SeaMonkey before 1.0.1, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown attack vectors related to DHTML. NOTE: due to the lack of sufficient public details from the vendor as of 20060413, it is unclear how CVE-2006-1529, CVE-2006-1530, CVE-2006-1531, and CVE-2006-1723 are different.

The Javascript interpreter (jsinterp.c) in Mozilla and Firefox before 1.5.1 does not properly dereference objects, which allows remote attackers to cause a denial of service (crash) or execute arbitrary code via unknown attack vectors related to garbage collection.

Mozilla Firefox before 1.5.0.1, Thunderbird 1.5 if running Javascript in mail, and SeaMonkey before 1.0 allow remote attackers to execute arbitrary code by changing an element's style from position:relative to position:static, which causes Gecko to operate on freed memory.

Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and earlier, and Netscape 8.0.3.3 and 7.2, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a hostname with all "soft" hyphens (character 0xAD), which is not properly handled by the NormalizeIDN call in nsStandardURL::BuildNormalizedSpec.