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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT Security Bulletin ASB-2015.0031 McAfee Security Bulletin - FREAK OpenSSL Vulnerability 10 April 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: McAfee Email Gateway (MEG) / Email and Web Security (EWS) McAfee Firewall Enterprise (MFE) McAfee Firewall Enterprise Control Center (MFE CC) McAfee Web Gateway (MWG) Operating System: Network Appliance Windows Impact/Access: Access Privileged Data -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-0206 CVE-2015-0205 CVE-2015-0204 CVE-2014-8275 CVE-2014-3572 CVE-2014-3571 CVE-2014-3570 CVE-2014-3569 CVE-2014-3568 Member content until: Sunday, May 10 2015 Reference: ASB-2015.0026 ASB-2015.0024 ESB-2014.1936 ESB-2014.1871 ESB-2014.1858 OVERVIEW Eight OpenSSL vulnerabilities have been discovered in multiple McAfee Products. [1] IMPACT The vendor has provided the following details on the vulnerability: "CVE-2014-3569: The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 0.9.8zc, 1.0.0o, and 1.0.1j does not properly handle attempts to use unsupported protocols, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an unexpected handshake, as demonstrated by an SSLv3 handshake to a no-ssl3 application with certain error handling. This issue became relevant after the CVE-2014-3568 fix. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3569 CVE-2014-3570: The BN_sqr implementation in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k does not properly calculate the square of a BIGNUM value, which might make it easier for remote attackers to defeat cryptographic protection mechanisms via unspecified vectors, related to crypto/bn/asm/mips.pl, crypto/bn/asm/x86_64-gcc.c, and crypto/bn/bn_asm.c. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3570 CVE-2014-3571: OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted DTLS message that is processed with a different read operation for the handshake header than for the handshake body, related to the dtls1_get_record function in d1_pkt.c and the ssl3_read_n function in s3_pkt.c. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3571 CVE-2014-3572: The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct ECDHE-to-ECDH downgrade attacks and trigger a loss of forward secrecy by omitting the ServerKeyExchange message. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3572 CVE-2014-8275: OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k does not enforce certain constraints on certificate data, which allows remote attackers to defeat a fingerprint-based certificate-blacklist protection mechanism by including crafted data within a certificate's unsigned portion, related to crypto/asn1/a_verify.c, crypto/dsa/dsa_asn1.c, crypto/ecdsa/ecs_vrf.c, and crypto/x509/x_all.c. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-8275 CVE-2015-0204: The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct RSA-to-EXPORT_RSA downgrade attacks and facilitate brute-force decryption by offering a weak ephemeral RSA key in a noncompliant role. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0204 CVE-2015-0205: The ssl3_get_cert_verify function in s3_srvr.c in OpenSSL 1.0.0 before 1.0.0p and 1.0.1 before 1.0.1k accepts client authentication with a Diffie-Hellman (DH) certificate without requiring a CertificateVerify message, which allows remote attackers to obtain access without knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that recognizes a Certification Authority with DH support. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0205 CVE-2015-0206: Memory leak in the dtls1_buffer_record function in d1_pkt.c in OpenSSL 1.0.0 before 1.0.0p and 1.0.1 before 1.0.1k allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate records for the next epoch, leading to failure of replay detection. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0206" [1] MITIGATION The vendor recommends applying the available patches or hotfixes for the relevant product. [1] REFERENCES [1] McAfee Security Bulletin - FREAK OpenSSL Vulnerability https://kc.mcafee.com/corporate/index?page=content&id=SB10108 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 iQIVAwUBVSdmDRLndAQH1ShLAQKrWQ//VfQ2j9tyYw8O3ethe+LBzH37uAyRapLn HK06WDPMK5oiUYCuwhWwoYkqpbAlpjbfEi0G4YspkoKytnpNIjhiNlHzUIvDVO1Y dsDt8T0mhQrlY+RIy8aD0vAKqC85aaEBuRQJXaI7MbwlROUo7SXBSZ19bGNju+Z1 jXzrzFshRqJ0fLSgWplaRhz3iAxsld8zuL6n4N2K9tnTezfJkvgQVF8j/ykg4rNt ba1IZR9ZSYSRESinrFxBF6buO4nrZugeCCBLDUQLO1Rs/sfoFJ4MmNIW6I9erNg6 T70+PT9z5ZfkQzHbEK/OPB686ejpS4NtC8pVPwXIcxM3fRHxXFz0l6DUAJXUGwyz mvTF0LGLVyDY8J32xMntqxM8BVF07StIStPxosehFE96gC4xQ3L+W/RXR6wm2wpu ZfcZEJ4V2q+ZMARgFYKYtnLDnxS/JzaePua2SGKT1T3ij7U1GkM1wGPT81xCPLUF TzorYuYGTWSMQ4Y61tPuu45nQWh0J39x6NurDjidF7CNNfQ0osaKBUTmqxlpa4xW k5yqi2VT6Izu4tC38FCRd0WCmbNZNVA8fg8T2pnqQWF7mQi6R9SmyA4GDoeTdH+i ykoq3z6FKZeqYHgzG8kLFM8y5rgZTWKiKqi2QqzbUAmUxEYsK7ihqFCfks4RPuf8 xuYuWwvaweY= =dwS3 -----END PGP SIGNATURE-----