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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2019.0041 McAfee Security Bulletin - Data Exchange Layer update fixes three vulnerabilities (CVE-2018-5391, CVE-2018-15473, and CVE-2018-0737) 29 January 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: McAfee Data Exchange Layer Broker Platform Operating System: Linux variants Impact/Access: Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-15473 CVE-2018-5391 CVE-2018-0737 Member content until: Thursday, February 28 2019 Reference: ASB-2018.0311 ASB-2018.0272 ESB-2018.3904 OVERVIEW Multiple vulnerabilities have been identified in McAfee Data Exchange Layer (DXL) Broker Platform in versions prior to 4.1.2 Hotfix 1 (HF1). [1] IMPACT Details of the vulnerabilities can be found below: "CVE-2018-5391 The Linux kernel, versions 3.9+, is vulnerable to a denial-of-service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size. https://nvd.nist.gov/vuln/detail/CVE-2018-5391 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5391 CVE-2018-15473 OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c. https://nvd.nist.gov/vuln/detail/CVE-2018-15473 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15473 CVE-2018-0737 The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o). https://nvd.nist.gov/vuln/detail/CVE-2018-0737 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0737" [1] MITIGATION McAfee recommends installing or updating to the following versions: "McAfee Data Exchange Layer Broker Platform 4.1.2 HF1" [1] REFERENCES [1] McAfee Security Bulletin - Data Exchange Layer update fixes three vulnerabilities (CVE-2018-5391, CVE-2018-15473, and CVE-2018-0737) https://kc.mcafee.com/corporate/index?page=content&id=SB10266 AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. 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. =========================================================================== 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 iQIVAwUBXE/to2aOgq3Tt24GAQhR3A/8CIGNweAaEFwE3V1/Pj8suXuFtH0AV0b6 GRG7KuTcugMa2qI85LJv1gGtUgE9C8RjIRIl/kLe09193YWW0DSu1FMCf6pbrOkr eVOQ3Y5xM+/f62kRfl/OWSPqfeAP3FFumUAVSRmNQSG1xgSD4pe6kh3XpgwzOe0e wGMR2goSILbnrfHGhQXFNtEftc/yw7sbVjssEV+KEt0wC3Yjb8ZAeMllLz1sJFMi 8HVvlm4q2YoL1jD5VN9MD/jZpNLwctp7opwD8r9XnUWQJTJ+h1P8XvBbS1wz9RfY DOGty2fcm5JMvoFDwcL+kYWgE+1IcaNE+5NdZUuD+ID6B53tiv1Fogn8RXwhqi+R Req4sOZcktge2I3lkX/qQsGVigmtaKBOO9SdzFLdnLv5WiucP2FFi3tcEJfpSEir ukY7dLXspsOuub3KfPXoxmrfoUoAYzkKuyf2g10/GIRZ5uR70qWvtCMyiup/MBQy lNsGP0daxbmQMs9GsZu9nss+fRCVbtDttslDQfrFooHZoGWI+WGPPtxl+RzmseWo JEEIBhN0PM4S2l4z8negEfQLYWfhyxXRiGwCP+fb3c3OhAZpjzRprB/wU1bQaMtp bIlONTN2lFHjoQ0ESQWS+YNdvCNxjkSydKwe6hLdMgSOdfsVulYMnKl7Gx9JgOHO f4VzcwwJCRs= =tUvp -----END PGP SIGNATURE-----