CVE-2008-3950

Description

Off-by-one error in the _web_drawInRect:withFont:ellipsis:alignment:measureOnly function in WebKit in Safari in Apple iPhone 1.1.4 and 2.0 and iPod touch 1.1.4 and 2.0 allows remote attackers to cause a denial of service (browser crash) via a JavaScript alert call with an argument that lacks breakable characters and has a length that is a multiple of the memory page size, leading to an out-of-bounds read.

Affected products

• apple / iPhone1.1.4 – 1.1.4
• apple / iPhone2.0 – 2.0
• apple / ipod_touch1.1.4 – 1.1.4
• apple / ipod_touch2.0 – 2.0
• apple / safari

Exploits & proofs of concept

• exploit-dbApple iOS 1.1.4/2.0 / iPod 1.1.4/2.0 touch Safari WebKit - 'alert()' Remote Denial of Serviceby Nicolas Economou

References

• MISChttp://www.securityfocus.com/bid/31061
• MISChttp://www.securityfocus.com/archive/1/496321/100/0/threaded
• MISChttp://www.coresecurity.com/content/iphone-safari-javascript-alert-denial-of-service
• MISChttp://securityreason.com/securityalert/4264