What’s Vulnerable › Vulnerabilities
CVE-2019-15126
- Severity: low (CVSS 3.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 7.3% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2020-02-05 · updated 2026-06-17
- Weakness: CWE-367
Description
An issue was discovered on Broadcom Wi-Fi client devices. Specifically timed and handcrafted traffic can cause internal errors (related to state transitions) in a WLAN device that lead to improper layer 2 Wi-Fi encryption with a consequent possibility of information disclosure over the air for a discrete set of traffic, a different vulnerability than CVE-2019-9500, CVE-2019-9501, CVE-2019-9502, and CVE-2019-9503.
Affected products
- Apple iPadOS: before 13.2 — fixed in 13.2
- Apple Iphone Os: before 13.2 — fixed in 13.2
- macOS: before 10.15.1 — fixed in 10.15.1
- Broadcom Bcm43012 Firmware: all versions
- Broadcom Bcm43013 Firmware: all versions
- Broadcom Bcm4356 Firmware: all versions
- Broadcom Bcm43752 Firmware: all versions
- Broadcom Bcm4375 Firmware: all versions
- Broadcom Bcm4389 Firmware: all versions
How to fix
Upgrade to a fixed version: Apple iPadOS 13.2; Apple Iphone Os 13.2; macOS 10.15.1. Check the vendor advisory for mitigations.
References
- http://packetstormsecurity.com/files/156809/Broadcom-Wi-Fi-KR00K-Proof-Of-Concept.html
- http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-003.txt
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200527-01-wifi-en
- http://www.huawei.com/en/psirt/security-notices/huawei-sn-20200228-01-kr00k-en
- https://cert-portal.siemens.com/productcert/pdf/ssa-712518.pdf
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0001
- https://support.apple.com/kb/HT210721
- https://support.apple.com/kb/HT210722
- https://support.apple.com/kb/HT210788
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-wi-fi-info-disclosure
- https://us-cert.cisa.gov/ics/advisories/icsa-20-224-05
- https://www.mist.com/documentation/mist-security-advisory-kr00k-attack-faq/
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