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AUSCERT Security Bulletin
ASB-2015.0031
McAfee Security Bulletin - FREAK OpenSSL Vulnerability
10 April 2015
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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.
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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.
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