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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.2875 [DLA 1867-1] wpa security update 1 August 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: wpa Publisher: Debian Operating System: Debian GNU/Linux 8 Impact/Access: Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Provide Misleading Information -- Remote with User Interaction Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-11555 CVE-2019-9499 CVE-2019-9498 CVE-2019-9497 CVE-2019-9495 Reference: ESB-2019.1908 ESB-2019.1876 ESB-2019.1258 ESB-2019.1237 Original Bulletin: https://security-tracker.debian.org/tracker/DLA-1867-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Package : wpa Version : 2.3-1+deb8u8 CVE ID : CVE-2019-9495 CVE-2019-9497 CVE-2019-9498 CVE-2019-9499=20 CVE-2019-11555 Debian Bug : 927463 Several vulnerabilities were discovered in WPA supplicant / hostapd. Some of them could only partially be mitigated, please read below for details. CVE-2019-9495 Cache-based side-channel attack against the EAP-pwd implementation: an attacker able to run unprivileged code on the target machine (including for example javascript code in a browser on a smartphone) during the handshake could deduce enough information to discover the password in a dictionary attack. This issue has only very partially been mitigated against by reducing measurable timing differences during private key operations. More work is required to fully mitigate this vulnerability. CVE-2019-9497 Reflection attack against EAP-pwd server implementation: a lack of validation of received scalar and elements value in the EAP-pwd-Commit messages could have resulted in attacks that would have been able to complete EAP-pwd authentication exchange without the attacker having to know the password. This did not result in the attacker being able to derive the session key, complete the following key exchange and access the network. CVE-2019-9498 EAP-pwd server missing commit validation for scalar/element: hostapd didn't validate values received in the EAP-pwd-Commit message, so an attacker could have used a specially crafted commit message to manipulate the exchange in order for hostapd to derive a session key from a limited set of possible values. This could have resulted in an attacker being able to complete authentication and gain access to the network. This issue could only partially be mitigated. CVE-2019-9499 EAP-pwd peer missing commit validation for scalar/element: wpa_supplicant didn't validate values received in the EAP-pwd-Commit message, so an attacker could have used a specially crafted commit message to manipulate the exchange in order for wpa_supplicant to derive a session key from a limited set of possible values. This could have resulted in an attacker being able to complete authentication and operate as a rogue AP. This issue could only partially be mitigated. CVE-2019-11555 The EAP-pwd implementation did't properly validate fragmentation reassembly state when receiving an unexpected fragment. This could have lead to a process crash due to a NULL pointer derefrence. An attacker in radio range of a station or access point with EAP-pwd support could cause a crash of the relevant process (wpa_supplicant or hostapd), ensuring a denial of service. For Debian 8 "Jessie", these problems have been fixed in version 2.3-1+deb8u8. We recommend that you upgrade your wpa packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - --=20 mike gabriel aka sunweaver (Debian Developer) fon: +49 (1520) 1976 148 GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31 mail: sunweaver@debian.org, http://sunweavers.net - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXUI4h2aOgq3Tt24GAQiukRAAiEmZIXczRbJ7TiGjFyFd6lVdDI/g+VQV UOUnVXA7D57V8xEku0HacJeg23SFz5M6McbZMjyfBY1tGB88lJAKKT8uLcN1ZQud wFBGiY6O6Pn8dUE2tupgIjleaAWbBRMKyGo5N4df42N1sL92lghGSY2zFa4/MSWb GRtgv8YktnvffHj2OZlhxZ58rvAxfDy5P2/lNwXK/KL+Zg9DKm+P7edGghbgtcsk YAEEAvuLiy6+D6JI2+R9helayh063bSYOAf72iF1xZXj9LTXvRhA20j/L7IuwOgd AGhD5zRLFN1+3DkvVXTEBafyRKBa0ZrtFg8gRrFkUhIXnR/YZI0g1YUIeXx2VD5V 328f08hJMmrReJI/323Yj0ilnXXf5BQ/9eq0Ua+O1K08/lNSBv+hEbCZ6gRwQKc1 dFgwCt5fFPf8BZBZmVMaWAcF6tBtsCBy5Srt4vqtr7wnKKBKDtgqzM8QPhcL3GJq ZTdUKDSqR8PCpM0ivFzWI7f8Gk3aE0GXFwHY7Id54Dkc82nSE/eZmA/T77mVw2QB lMYEJdDSc11KhdRwytni8uhpPnHLuALAnp3FG/K+B0JVqqGB9N3PCnAoGgaYMh9M 5mDWZa1YfRnLy/aEcM1el0RUa8X7vEKEUsAnbCggYYgLmIeNgLPZy+eaT+SbCFV2 eV8/2hSY6Zs= =+Abw -----END PGP SIGNATURE-----