German site iFix claims that iOS 6.1.2 will be in the public realm by February 20, at the latest, as Apple looks to lockdown the dangerous flaw.
Earlier this week a video was posted online showing how a complex series of button pushes could nullify the passcode and unlock photo albums, calling logs, voicemail and enable the hacker to modify contacts.
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Apple has acknowledged the problem, which is almost identical to one which surfaced in 2010, and said it is hastily working on a fix, but did not state when it would arrive.
"Apple takes user security very seriously," said company spokesperson Trudy Muller on Thursday. "We are aware of this issue and will deliver a fix in a future software update."
Now iFix, quoting the same sources it used to pre-empt the release of iOS 6.1.1 last week, to predict iOS 6.1.2 will arrive early next week, perhaps as soon as Monday or Tuesday.