CVE-2020-9844 - Double Free

Severity

75%

Complexity

39%

Confidentiality

60%

A double free issue was addressed with improved memory management. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 7.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

First reported 4 years ago

2020-06-09 17:15:00

Last updated 4 years ago

2020-10-16 17:15:00

Affected Software

Apple Mac OS X

References

https://support.apple.com/HT211168

Vendor Advisory

https://support.apple.com/HT211170

Vendor Advisory

http://packetstormsecurity.com/files/158225/iOS-macOS-Wifi-Proximity-Kernel-Double-Free.html

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