What’s Vulnerable › Vulnerabilities

CVE-2017-11120

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-09-28 · updated 2026-06-17
• Weakness: CWE-119

Description

On Broadcom BCM4355C0 Wi-Fi chips 9.44.78.27.0.1.56 and other chips, an attacker can craft a malformed RRM neighbor report frame to trigger an internal buffer overflow in the Wi-Fi firmware, aka B-V2017061204.

Affected products

• Apple Iphone Os: before 11.0 — fixed in 11.0
• Apple tvOS: before 11.0 — fixed in 11.0
• Broadcom Bcm4355C0 Firmware: 9.44.78.27.0.1.56

How to fix

Upgrade to a fixed version: Apple Iphone Os 11.0; Apple tvOS 11.0. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/144328/Broadcom-802.11k-Neighbor-Report-Response-Out-Of-Bounds-Write.html
• http://www.securityfocus.com/bid/100984
• https://bugs.chromium.org/p/project-zero/issues/detail?id=1289
• https://lists.apple.com/archives/security-announce/2017/Sep/msg00007.html
• https://lists.apple.com/archives/security-announce/2017/Sep/msg00009.html
• https://source.android.com/security/bulletin/2017-09-01
• https://support.apple.com/HT208112
• https://support.apple.com/HT208113
• https://support.apple.com/en-us/HT208112
• https://support.apple.com/en-us/HT208113
• https://www.exploit-db.com/exploits/42784/
• http://packetstormsecurity.com/files/144328/Broadcom-802.11k-Neighbor-Report-Response-Out-Of-Bounds-Write.html

Get alerted when CVE-2017-11120 or the next vulnerability affects your stack