The flaws could be used to create a virus that spreads through a Web link sent via e-mail messages. An attacker would have to also create a Web site with special programming.
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"Since these 'exploits' are on the rise and it's so easy to protect yourself--here you go," lixlpixel's posting said.
Apple refused to comment on the vulnerability, except to publish a release saying that such reports are taken "very seriously at Apple and we are actively investigating this potential security issue."
Apple has twice been criticized for itsand its to the concerns of the security industry.
Security information service Secunia on Tuesday, because online discussions have pointed out many different ways to exploit the flaws. Secunia recommended that Mac users avoid visiting untrusted Web sites and said Mac administrators and others avoid surfing the Internet while signed on to their networks as privileged users.
Secunia verified the flaws in Apple's operating system by viewing malicious code using Internet Explorer for the Mac and Safari.
More about this issue can be found in the advisories section of .