Remote code execution in Mozilla Firefox

Published: 2010-10-27 | Updated: 2017-02-01
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2010-3765
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Mozilla Firefox
Client/Desktop applications / Web browsers

Client/Desktop applications / Web browsers

Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor Mozilla

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Heap-based buffer overflow


Risk: Critical

CVSSv3.1: 9.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2010-3765

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error within nsCSSFrameConstructor::ContentAppended. A remote attacker can create a specially crafted web page containing specially crafted document.write and appendChild calls, cause heap-based buffer overflow and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.

Note: this vulnerability is being actively exploited.


Install the following software versions:

  • Firefox 3.5.15
  • Firefox 3.6.12
  • SeaMonkey 2.0.10
  • Thunderbird 3.0.10
  • Thunderbird 3.1.6

Vulnerable software versions

Mozilla Firefox: 3.5 - 3.6.11

SeaMonkey: 2.0 - 2.0.9

Mozilla Thunderbird: 3.0 - 3.1.5

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.