Vulnerability identifier: #VU5585

Vulnerability 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

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
SeaMonkey
Client/Desktop applications / Web browsers
Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor: Mozilla

Description

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.

Mitigation
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

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External links
http://bugzilla.mozilla.org/show_bug.cgi?id=607222
http://www.mozilla.org/en-US/security/advisories/mfsa2010-73/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.