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AUSCERT External Security Bulletin Redistribution
Unauthenticated EAPOL-Key Decryption Vulnerability
23 August 2018
AusCERT Security Bulletin Summary
Operating System: FreeBSD
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
CVE Names: CVE-2018-14526
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FreeBSD -- Unauthenticated EAPOL-Key Decryption Vulnerability
11.2 <= FreeBSD < 11.2_2
11.1 <= FreeBSD < 11.1_13
10.4 <= FreeBSD < 10.4_11
VuXML ID 45671c0e-a652-11e8-805b-a4badb2f4699
When using WPA2, EAPOL-Key frames with the Encrypted flag and without the MIC
flag set, the data field was decrypted first without verifying the MIC. When
the dta field was encrypted using RC4, for example, when negotiating TKIP as a
pairwise cipher, the unauthenticated but decrypted data was subsequently
processed. This opened wpa_supplicant(8) to abuse by decryption and recovery
of sensitive information contained in EAPOL-Key messages.
See https://w1.fi/security/2018-1/unauthenticated-eapol-key-decryption.txt for
a detailed description of the bug.
All users of the WPA2 TKIP pairwise cipher are vulnerable to information, for
example, the group key.
CVE Name CVE-2018-1452
FreeBSD Advisory SA-18:11.hostapd
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