The WebSockets implementation in Mozilla Firefox 4 through 4.0 Beta 7 does not properly perform proxy upgrade negotiation, which has unspecified impact and remote attack vectors, related to an "inherent problem" with the WebSocket specification.

opera 11.00 fixes among other things several security vulnerabilities.
Please refer opera's site for more information:
http://www.opera.com/docs/changelogs/unix/1100/

(CVE-2010-4508, CVE-2010-4579, CVE-2010-4580, CVE-2010-4581, CVE-2010-4582, CVE-2010-4583, CVE-2010-4584, CVE-2010-4585, CVE-2010-4586)

The remote host is affected by the vulnerability described in GLSA-201301-01 (Mozilla Products: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Mozilla Firefox,       Thunderbird, SeaMonkey, NSS, GNU IceCat, and XULRunner. Please review the       CVE identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user to view a specially crafted web       page or email, possibly resulting in execution of arbitrary code or a       Denial of Service condition. Furthermore, a remote attacker may be able       to perform Man-in-the-Middle attacks, obtain sensitive information,       bypass restrictions and protection mechanisms, force file downloads,       conduct XML injection attacks, conduct XSS attacks, bypass the Same       Origin Policy, spoof URL&rsquo;s for phishing attacks, trigger a vertical       scroll, spoof the location bar, spoof an SSL indicator, modify the       browser&rsquo;s font, conduct clickjacking attacks, or have other unspecified       impact.
    A local attacker could gain escalated privileges, obtain sensitive       information, or replace an arbitrary downloaded file.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
75693	openSUSE Security Update : opera (openSUSE-SU-2010:1094-1)	Nessus	SuSE Local Security Checks	critical
63402	GLSA-201301-01 : Mozilla Products: Multiple vulnerabilities (BEAST)	Nessus	Gentoo Local Security Checks	critical
53786	openSUSE Security Update : opera (openSUSE-SU-2010:1094-1)	Nessus	SuSE Local Security Checks	critical
53686	openSUSE Security Update : opera (openSUSE-SU-2010:1094-1)	Nessus	SuSE Local Security Checks	critical

Detections

Analytics

CVE-2010-4508

critical

Tenable Plugins

critical

critical

critical

critical