
Hoping not to lose Pwn2Own contest
Apple, which is always embarrassed at the speed that
hackers can turn over its machines at the annual Pwn2Own contest has rushed out
a serious of Safari patches.
The move, which a cynic would say was simply to prevent
Jobs' Mobs' security been shown up to be marketing spin again,
required more than 16 vulnerabilities that Apple did not admit to be
patched. Apple has done a good job of convincing punters, in the
face of evidence, that its machines are more secure than Windows.
Apple issued patches for 16 vulnerabilities in Safari,
including 12 bugs that could be used to execute code on a vulnerable machine
and potentially take full control. Apple said that nine of the 16 flaws rested in
Webkit, Safari’s open-source browser engine, and all but one of those can be
exploited to execute arbitrary code on a victim’s machine.
Seven deal with what Apple called “use-after-free” issues
tied to Webkit’s handling of incorrectly nested HTML tags, its parsing
of XML
documents and its handling of HTML elements and callbacks for those
elements. Four of the fixes are in the ImageIO component. The most
serious of these are memory corruption and buffer overflow
vulnerabilities attackers
could exploit with malicious TIFF images to compromise users and
execute
arbitrary code. Both the other ImageIO patches deal with uninitialized
memory
access issues tied to the component’s handling of BMP and TIFF images,
respectively.
There is also a heap buffer overflow vulnerability in the
ColorSync component, a cookie handling issue in PubSub and a problem with
Safari's handling of external URL schemes. It can't be a coincidence that the patches are released
two weeks ahead of the Pwn2Own 2010 hacking challenge. In the challenge security experts try to bring down the
security of Safari, Microsoft Internet Explorer, Mozilla Firefox and Google
Chrome in a battle for $40,000 in prize money. The contest, which also includes
a smartphone challenge for $60,000, will be held March 24-26 at the CanSecWest
security conference in Vancouver, B.C.
Every year Apple machines have been the laughing stock of
the conference usually being broke into within seconds.