Apple patches Safari vulnerabilities ahead of Pwn2Own

Pwn2Own 2010 is just around the corner, and Apple has taken this opportunity to harden its web browser's security ahead of the event.

Apple has been left with egg on its face for two years at Pwn2Own, with security researcher Charlie Miller taking only minutes to compromise Mac OS X both in 2008 and 2009, leveraging unpatched flaws in the Safari web browser. This year, the Cupertino giant has shored up the defenses ahead of the event, patching 16 vulnerabilities with the release of Safari 4.0.5.

The last Safari update released by Apple was in November 2009.

Here's a list of fixes:

1. ColorSync CVE-ID: CVE-2010-0040 Available for: Windows 7, Vista, XP Impact: Viewing a maliciously crafted image with an embedded color profile may lead to an unexpected application termination or arbitrary code execution Description: An integer overflow that could result in a heap buffer overflow exists in the handling of images with an embedded color profile. Opening a maliciously crafted image with an embedded color profile may lead to an unexpected application termination or arbitrary code execution. The issue is addressed by performing additional validation of color profiles. This issue does not affect Mac OS X systems. Credit to Sebastien Renaud of VUPEN Vulnerability Research Team for reporting this issue.
2. ImageIO CVE-ID: CVE-2009-2285 Available for: Windows 7, Vista, XP Impact: Viewing a maliciously crafted TIFF image may lead to an nexpected application termination or arbitrary code execution Description: A buffer underflow exists in ImageIO's handling of TIFF images. Viewing a maliciously crafted TIFF image may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved bounds checking. For Mac OS X v10.6 systems, this issue is addressed in Mac OS X v10.6.2. For Mac OS X v10.5 systems, this issue is addressed in Security Update 2010-001.
3. ImageIO CVE-ID: CVE-2010-0041 Available for: Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may result in sending data from Safari's memory to the website Description: An uninitialized memory access issue exists in ImageIO's handling of BMP images. Visiting a maliciously crafted website may result in sending data from Safari's memory to the website. This issue is addressed through improved memory handling and additional validation of BMP images. Credit to Matthew 'j00ru' Jurczyk of Hispasec for reporting this issue.
4. ImageIO CVE-ID: CVE-2010-0042 Available for: Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may result in sending data from Safari's memory to the website Description: An uninitialized memory access issue exists in ImageIO's handling of TIFF images. Visiting a maliciously crafted website may result in sending data from Safari's memory to the website. This issue is addressed through improved memory handling and additional validation of TIFF images. Credit to Matthew 'j00ru' Jurczyk of Hispasec for reporting this issue.
5. ImageIO CVE-ID: CVE-2010-0043 Available for: Windows 7, Vista, XP Impact: Processing a maliciously crafted TIFF image may lead to an unexpected application termination or arbitrary code execution Description: A memory corruption issue exists in the handling of TIFF images. Processing a maliciously crafted TIFF image may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory handling. Credit to Gus Mueller of Flying Meat for reporting this issue.
6. PubSub CVE-ID: CVE-2010-0044 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting or updating a feed may result in a cookie being set, even if Safari is configured to block cookies Description: An implementation issue exists in the handling of cookies set by RSS and Atom feeds. Visiting or updating a feed may result in a cookie being set, even if Safari is configured to block cookies via the "Accept Cookies" preference. This update addresses the issue by respecting the preference while updating or viewing feeds.
7. Safari CVE-ID: CVE-2010-0045 Available for: Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to arbitrary code execution Description: An issue in Safari's handling of external URL schemes may cause a local file to be opened in response to a URL encountered on a web page. Visiting a maliciously crafted website may lead to arbitrary code execution. This update addresses the issue through improved validation of external URLs. This issue does not affect Mac OS X systems. Credit to Billy Rios and Microsoft Vulnerability Research (MSVR) for reporting this issue.
8. WebKit CVE-ID: CVE-2010-0046 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A memory corruption issue exists in WebKit's handling of CSS format() arguments. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved handling of CSS format() arguments. Credit to Robert Swiecki of Google Inc. for reporting this issue.
9. WebKit CVE-ID: CVE-2010-0047 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in the handling of HTML object element fallback content. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking. Credit to wushi of team509, working with TippingPoint's Zero Day Initiative, for reporting this issue.
10. WebKit CVE-ID: CVE-2010-0048 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in WebKit's parsing of XML documents. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking.
11. Webkit CVE-ID: CVE-2010-0049 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in the handling of HTML elements containing right-to-left displayed text. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking. Credit to wushi&Z of team509 for reporting this issue.
12. WebKit CVE-ID: CVE-2010-0050 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in WebKit's handling of incorrectly nested HTML tags. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking. Credit to wushi&Z of team509 working with TippingPoint's Zero Day Initiative for reporting this issue.
13. WebKit CVE-ID: CVE-2010-0051 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to the disclosure of sensitive information Description: An implementation issue exists in WebKit's handling of cross-origin stylesheet requests. Visiting a maliciously crafted website may disclose the content of protected resources on another website. This update addresses the issue by performing additional validation on stylesheets that are loaded during a cross-origin request.
14. WebKit CVE-ID: CVE-2010-0052 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in WebKit's handling of callbacks for HTML elements. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking. Credit: Apple.
15. WebKit CVE-ID: CVE-2010-0053 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in the rendering of content with a CSS display property set to 'run-in'. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking. Credit to wushi of team509, working with TippingPoint's Zero Day Initiative for reporting this issue.
16. WebKit CVE-ID: CVE-2010-0054 Available for: Mac OS X v10.4.11, Mac OS X Server v10.4.11, Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.1 or later, Mac OS X Server v10.6.1 or later, Windows 7, Vista, XP Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution Description: A use-after-free issue exists in WebKit's handling of HTML image elements. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory reference tracking. Credit: Apple.

Safari 4.0.5 is available for download from Apple's website, and applies to Windows XP, Vista and 7, and Mac OS X 10.4, 10.4 and 10.6.