The WebCore::HTMLLinkElement::process function in WebCore/html/HTMLLinkElement.cpp in WebKit, as used in Apple Safari before 5.0.3 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1.3 on Mac OS X 10.4; webkitgtk before 1.2.6; and possibly other products does not verify whether DNS prefetching is enabled when processing an HTML LINK element, which allows remote attackers to bypass intended access restrictions, as demonstrated by an HTML e-mail message that uses a LINK element for X-Confirm-Reading-To functionality.

The remote host is affected by the vulnerability described in GLSA-201412-09 (Multiple packages, Multiple vulnerabilities fixed in 2011)

    Vulnerabilities have been discovered in the packages listed below.
      Please review the CVE identifiers in the Reference section for details.
      FMOD Studio       PEAR Mail       LVM2       GnuCash       xine-lib       Last.fm Scrobbler       WebKitGTK+       shadow tool suite       PEAR       unixODBC       Resource Agents       mrouted       rsync       XML Security Library       xrdb       Vino       OProfile       syslog-ng       sFlow Toolkit       GNOME Display Manager       libsoup       CA Certificates       Gitolite       QtCreator       Racer   Impact :

    A context-dependent attacker may be able to gain escalated privileges,       execute arbitrary code, cause Denial of Service, obtain sensitive       information, or otherwise bypass security restrictions.
  Workaround :

    There are no known workarounds at this time.

Various bugs in webkit have been fixed. The CVE id's are :

CVE-2009-0945, CVE-2009-1681, CVE-2009-1684, CVE-2009-1685, CVE-2009-1686, CVE-2009-1687, CVE-2009-1688, CVE-2009-1689, CVE-2009-1691, CVE-2009-1690, CVE-2009-1692, CVE-2009-1693, CVE-2009-1694, CVE-2009-1695, CVE-2009-1696, CVE-2009-1697, CVE-2009-1698, CVE-2009-1699, CVE-2009-1700, CVE-2009-1701, CVE-2009-1702, CVE-2009-1703, CVE-2009-1709, CVE-2009-1710, CVE-2009-1711, CVE-2009-1712, CVE-2009-1713, CVE-2009-1714, CVE-2009-1715, CVE-2009-1718, CVE-2009-1724, CVE-2009-1725, CVE-2009-2195, CVE-2009-2199, CVE-2009-2200, CVE-2009-2419, CVE-2009-2797, CVE-2009-2816, CVE-2009-2841, CVE-2009-3272, CVE-2009-3384, CVE-2009-3933, CVE-2009-3934, CVE-2010-0046, CVE-2010-0047, CVE-2010-0048, CVE-2010-0049, CVE-2010-0050, CVE-2010-0052, CVE-2010-0053, CVE-2010-0054, CVE-2010-0315, CVE-2010-0647, CVE-2010-0051, CVE-2010-0650, CVE-2010-0651, CVE-2010-0656, CVE-2010-0659, CVE-2010-0661, CVE-2010-1029, CVE-2010-1126, CVE-2010-1233, CVE-2010-1236, CVE-2010-1386, CVE-2010-1387, CVE-2010-1388, CVE-2010-1389, CVE-2010-1390, CVE-2010-1391, CVE-2010-1392, CVE-2010-1393, CVE-2010-1394, CVE-2010-1395, CVE-2010-1396, CVE-2010-1397, CVE-2010-1398, CVE-2010-1399, CVE-2010-1400, CVE-2010-1401, CVE-2010-1402, CVE-2010-1403, CVE-2010-1404, CVE-2010-1405, CVE-2010-1406, CVE-2010-1407, CVE-2010-1408, CVE-2010-1409, CVE-2010-1410, CVE-2010-1412, CVE-2010-1413, CVE-2010-1414, CVE-2010-1415, CVE-2010-1416, CVE-2010-1417, CVE-2010-1418, CVE-2010-1419, CVE-2010-1421, CVE-2010-1422, CVE-2010-1729, CVE-2010-1749, CVE-2010-1757, CVE-2010-1758, CVE-2010-1759, CVE-2010-1760, CVE-2010-1761, CVE-2010-1762, CVE-2010-1763, CVE-2010-1764, CVE-2010-1766, CVE-2010-1767, CVE-2010-1769, CVE-2010-1770, CVE-2010-1771, CVE-2010-1772, CVE-2010-1773, CVE-2010-1774, CVE-2010-1780, CVE-2010-1781, CVE-2010-1782, CVE-2010-1783, CVE-2010-1784, CVE-2010-1785, CVE-2010-1786, CVE-2010-1787, CVE-2010-1788, CVE-2010-1789, CVE-2010-1790, CVE-2010-1791, CVE-2010-1792, CVE-2010-1793, CVE-2010-1807, CVE-2010-1812, CVE-2010-1813, CVE-2010-1814, CVE-2010-1815, CVE-2010-1822, CVE-2010-1823, CVE-2010-1824, CVE-2010-1825, CVE-2010-2264, CVE-2010-2295, CVE-2010-2297, CVE-2010-2300, CVE-2010-2301, CVE-2010-2302, CVE-2010-2441, CVE-2010-3116, CVE-2010-3257, CVE-2010-3259, CVE-2010-3312, CVE-2010-3803, CVE-2010-3804, CVE-2010-3805, CVE-2010-3808, CVE-2010-3809, CVE-2010-3810, CVE-2010-3811, CVE-2010-3812, CVE-2010-3813, CVE-2010-3816, CVE-2010-3817, CVE-2010-3818, CVE-2010-3819, CVE-2010-3820, CVE-2010-3821, CVE-2010-3822, CVE-2010-3823, CVE-2010-3824, CVE-2010-3826, CVE-2010-3829, CVE-2010-3900, CVE-2010-4040

From Red Hat Security Advisory 2011:0177 :

Updated webkitgtk packages that fix several security issues are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

WebKitGTK+ is the port of the portable web rendering engine WebKit to the GTK+ platform.

Multiple memory corruption flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-1782, CVE-2010-1783, CVE-2010-1784, CVE-2010-1785, CVE-2010-1787, CVE-2010-1788, CVE-2010-1790, CVE-2010-1792, CVE-2010-1807, CVE-2010-1814, CVE-2010-3114, CVE-2010-3116, CVE-2010-3119, CVE-2010-3255, CVE-2010-3812, CVE-2010-4198)

Multiple use-after-free flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-1780, CVE-2010-1786, CVE-2010-1793, CVE-2010-1812, CVE-2010-1815, CVE-2010-3113, CVE-2010-3257, CVE-2010-4197, CVE-2010-4204)

Two array index errors, leading to out-of-bounds memory reads, were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash. (CVE-2010-4206, CVE-2010-4577)

A flaw in WebKit could allow malicious web content to trick a user into thinking they are visiting the site reported by the location bar, when the page is actually content controlled by an attacker.
(CVE-2010-3115)

It was found that WebKit did not correctly restrict read access to images created from the 'canvas' element. Malicious web content could allow a remote attacker to bypass the same-origin policy and potentially access sensitive image data. (CVE-2010-3259)

A flaw was found in the way WebKit handled DNS prefetching. Even when it was disabled, web content containing certain 'link' elements could cause WebKitGTK+ to perform DNS prefetching. (CVE-2010-3813)

Users of WebKitGTK+ should upgrade to these updated packages, which contain WebKitGTK+ version 1.2.6, and resolve these issues. All running applications that use WebKitGTK+ must be restarted for this update to take effect.

Multiple memory corruption flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-1782, CVE-2010-1783, CVE-2010-1784, CVE-2010-1785, CVE-2010-1787, CVE-2010-1788, CVE-2010-1790, CVE-2010-1792, CVE-2010-1807, CVE-2010-1814, CVE-2010-3114, CVE-2010-3116, CVE-2010-3119, CVE-2010-3255, CVE-2010-3812, CVE-2010-4198)

Multiple use-after-free flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-1780, CVE-2010-1786, CVE-2010-1793, CVE-2010-1812, CVE-2010-1815, CVE-2010-3113, CVE-2010-3257, CVE-2010-4197, CVE-2010-4204)

Two array index errors, leading to out-of-bounds memory reads, were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash. (CVE-2010-4206, CVE-2010-4577)

A flaw in WebKit could allow malicious web content to trick a user into thinking they are visiting the site reported by the location bar, when the page is actually content controlled by an attacker.
(CVE-2010-3115)

It was found that WebKit did not correctly restrict read access to images created from the 'canvas' element. Malicious web content could allow a remote attacker to bypass the same-origin policy and potentially access sensitive image data. (CVE-2010-3259)

A flaw was found in the way WebKit handled DNS prefetching. Even when it was disabled, web content containing certain 'link' elements could cause WebKitGTK+ to perform DNS prefetching. (CVE-2010-3813)

All running applications that use WebKitGTK+ must be restarted for this update to take effect.

A large number of security issues were discovered in the WebKit browser and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Multiple cross-site scripting, denial of service and arbitrary code execution security flaws were discovered in webkit.

Please consult the CVE web links for further information.

The updated packages have been upgraded to the latest version (1.2.7) to correct these issues.

Updated webkitgtk packages that fix several security issues are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

WebKitGTK+ is the port of the portable web rendering engine WebKit to the GTK+ platform.

Multiple memory corruption flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-1782, CVE-2010-1783, CVE-2010-1784, CVE-2010-1785, CVE-2010-1787, CVE-2010-1788, CVE-2010-1790, CVE-2010-1792, CVE-2010-1807, CVE-2010-1814, CVE-2010-3114, CVE-2010-3116, CVE-2010-3119, CVE-2010-3255, CVE-2010-3812, CVE-2010-4198)

Multiple use-after-free flaws were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2010-1780, CVE-2010-1786, CVE-2010-1793, CVE-2010-1812, CVE-2010-1815, CVE-2010-3113, CVE-2010-3257, CVE-2010-4197, CVE-2010-4204)

Two array index errors, leading to out-of-bounds memory reads, were found in WebKit. Malicious web content could cause an application using WebKitGTK+ to crash. (CVE-2010-4206, CVE-2010-4577)

A flaw in WebKit could allow malicious web content to trick a user into thinking they are visiting the site reported by the location bar, when the page is actually content controlled by an attacker.
(CVE-2010-3115)

It was found that WebKit did not correctly restrict read access to images created from the 'canvas' element. Malicious web content could allow a remote attacker to bypass the same-origin policy and potentially access sensitive image data. (CVE-2010-3259)

A flaw was found in the way WebKit handled DNS prefetching. Even when it was disabled, web content containing certain 'link' elements could cause WebKitGTK+ to perform DNS prefetching. (CVE-2010-3813)

Users of WebKitGTK+ should upgrade to these updated packages, which contain WebKitGTK+ version 1.2.6, and resolve these issues. All running applications that use WebKitGTK+ must be restarted for this update to take effect.

- New stable release, API and ABI compatible with previous     1.2.x versions

    - Fixes crashes with newer libpng (>= 1.4)

    - The patches to fix the following CVEs are included       with help from Huzaifa Sidhpurwala <huzaifas at       redhat.com> from the Red Hat security team

CVE-2010-4198 CVE-2010-4197 CVE-2010-4204 CVE-2010-4206 CVE-2010-1791 CVE-2010-3812 CVE-2010-3813 CVE-2010-4577

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Gustavo Noronha Silva reports :

The patches to fix the following CVEs are included with help from Huzaifa Sidhpurwala from the Red Hat security team.

The remote mobile host is a using a version of Apple iOS earlier than 4.2. Such versions are potentially affected by multiple vulnerabilities. Apple iOS 4.2 contains security fixes for the following components :

  - Configuration Policies

  - CoreGraphics

  - FreeType

  - iAd Content Display

  - ImageIO

  - libxml

  - Mail

  - Networking

  - OfficeImport

  - Photos

  - Safari

  - Telephony

  - WebKit

  - Multiple components

The version of Safari installed on the remote Windows host is earlier than 5.0.3.  As such, it is potentially affected by numerous issues in its WebKit component that could allow arbitrary code execution, session tracking, address bar spoofing, and other sorts of attacks.

The version of Apple Safari installed on the remote Mac OS X host is earlier than 5.0.3 / 4.1.3.  As such, it is potentially affected by numerous issues in its WebKit component that could allow arbitrary code execution, session tracking, address bar spoofing, and other sorts of attacks.

The remote host has Safari installed.

Versions of Safari earlier than 4.1.3 / 5.0.3 are potentially affected by several issues in the following component :

  - Safari

  -  Webkit

ID	Name	Product	Family	Severity
79962	GLSA-201412-09 : Multiple packages, Multiple vulnerabilities fixed in 2011	Nessus	Gentoo Local Security Checks	critical
75629	openSUSE Security Update : libwebkit (openSUSE-SU-2011:0024-1)	Nessus	SuSE Local Security Checks	critical
68187	Oracle Linux 6 : webkitgtk (ELSA-2011-0177)	Nessus	Oracle Linux Local Security Checks	critical
60943	Scientific Linux Security Update : webkitgtk on SL6.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	critical
55967	Ubuntu 10.04 LTS / 10.10 : webkit vulnerabilities (USN-1195-1)	Nessus	Ubuntu Local Security Checks	critical
53764	openSUSE Security Update : libwebkit (openSUSE-SU-2011:0024-1)	Nessus	SuSE Local Security Checks	critical
52523	Mandriva Linux Security Advisory : webkit (MDVSA-2011:039)	Nessus	Mandriva Local Security Checks	critical
51672	RHEL 6 : webkitgtk (RHSA-2011:0177)	Nessus	Red Hat Local Security Checks	critical
51444	Fedora 13 : webkitgtk-1.2.6-1.fc13 (2011-0121)	Nessus	Fedora Local Security Checks	high
51404	FreeBSD : webkit-gtk2 -- Multiple vulnerabilities (06a12e26-142e-11e0-bea2-0015f2db7bde)	Nessus	FreeBSD Local Security Checks	high
5715	Apple iOS < 4.2 Multiple Vulnerabilities	Nessus Network Monitor	Mobile Devices	critical
50654	Safari < 5.0.3 Multiple Vulnerabilities	Nessus	Windows	high
50653	Mac OS X : Apple Safari < 5.0.3 / 4.1.3	Nessus	MacOS X Local Security Checks	high
801005	Safari < 4.1.3 / 5.0.3 Multiple Vulnerabilities	Log Correlation Engine	Web Clients	high
5711	Safari < 4.1.3 / 5.0.3 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	high

Detections

Analytics

CVE-2010-3813

medium

Tenable Plugins

critical

critical

critical

critical

critical

critical

critical

critical

high

high

critical

high

high

high

high