SB2021071908 - Remote code execution in Apple iOS
Published: July 19, 2021 Updated: July 22, 2021
Security Bulletin ID
SB2021071908
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Format string error (CVE-ID: CVE-2021-30800)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a format string error in the wifid daemon when processing SSID name while connecting to a Wi-Fi hotspot. A remote attacker can supply a specially crafted SSID name that contains format string specifiers and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
References
- https://blog.zecops.com/research/meet-wifidemon-ios-wifi-rce-0-day-vulnerability-and-a-zero-click-vulnerability-that-was-silently-patched/
- https://www.bleepingcomputer.com/news/security/iphone-bug-breaks-wifi-when-you-join-hotspot-with-unusual-name/
- https://blog.chichou.me/2021/06/20/quick-analysis-wifid/
- https://support.apple.com/en-us/HT212601