vendor:
iOS
by:
ianbeer
7,8
CVSS
HIGH
Out-of-bounds Read
125
CWE
Product Name: iOS
Affected Version From: iOS 10
Affected Version To: iOS 10
Patch Exists: YES
Related CWE: N/A
CPE: N/A
Metasploit:
N/A
Other Scripts:
N/A
Tags: N/A
CVSS Metrics: N/A
Nuclei References:
N/A
Nuclei Metadata: N/A
Platforms Tested: MacOS
2016
MacOS/iOS kernel memory corruption due to Bad bounds checking in SIOCSIFORDER socket ioctl
SIOCSIFORDER is a new ioctl added in iOS 10. It can be called on a regular tcp socket, so from pretty much any sandbox. By providing a value with the most-significant bit set making it negative when cast to a signed type, we can pass the bounds check at (b) and lead to reading an interface pointer out-of-bounds below the ifindex2ifnet array. This leads very directly to memory corruption at (d) which will add the value read out of bounds to a list structure.
Mitigation:
Ensure that bounds checking is performed correctly when using the SIOCSIFORDER ioctl.
