Zero-day Vulnerability Database

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Zero-day vulnerabilities discovered: 1

Remote code execution in Mozilla Firefox
CVE-2010-3765

Heap-based buffer overflow

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.

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The vulnerability was reported by Morten Kr├еkvik of Telenor SOC (a Norwegian security vendor). The Nobel Peace Prize website was serving on October 25, 2010 a zero-day exploit against Firefox users. When people accessed the Nobel Peace Prize site they were diverted onto an attack server located in Taiwan which delivered a JavaScript exploit.

Software: Mozilla Firefox

Known/fameous malware:

Exploit: Belmoo Trojan.

The vulnerability was reported by Morten Kr├еkvik of Telenor SOC (a Norwegian security vendor). The Nobel Peace Prize website was serving on October 25, 2010 a zero-day exploit against Firefox users. When people accessed the Nobel Peace Prize site they were diverted onto an attack server located in Taiwan which delivered a JavaScript exploit.

Links:

https://www.mozilla.org/en-US/security/advisories/mfsa2010-73/
http://kodu.ut.ee/~mroos/turve/2010/referaadid/atr_ik.pdf
https://krebsonsecurity.com/2010/10/nobel-peace-prize-site-serves-firefox-0day/ https://blog.mozilla.org/security/2010/10/26/critical-vulnerability-in-firefox-3-5-and-firefox-3-6/
https://lists.fedoraproject.org/pipermail/package-announce/2010-October/050061.html
http://blog.shavlik.com/patch-tuesday-meet-patch-thursday/
http://www.spamfighter.com/News-15349-Mozilla-Patches-Critical-0-Day-Flaw-Inside-Firefox-Within-48-H...
http://kodu.ut.ee/~mroos/turve/2010/referaadid/atr_ik.pdf

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About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.