[SECURITY] [DSA 3125-1] openssl security update

Debian Security Advisory DSA-3125-1 [email protected]
http://www.debian.org/security/ Salvatore Bonaccorso
January 11, 2015 http://www.debian.org/security/faq

Package : openssl
CVE ID : CVE-2014-3569 CVE-2014-3570 CVE-2014-3571 CVE-2014-3572
CVE-2014-8275 CVE-2015-0204 CVE-2015-0205 CVE-2015-0206

Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit. The Common Vulnerabilities and Exposures project
identifies the following issues:

CVE-2014-3569

Frank Schmirler reported that the ssl23_get_client_hello function in
OpenSSL does not properly handle attempts to use unsupported
protocols. When OpenSSL is built with the no-ssl3 option and a SSL
v3 ClientHello is received, the ssl method would be set to NULL which
could later result in a NULL pointer dereference and daemon crash.

CVE-2014-3570

Pieter Wuille of Blockstream reported that the bignum squaring
(BN_sqr) may produce incorrect results on some platforms, which
might make it easier for remote attackers to defeat cryptographic
protection mechanisms.

CVE-2014-3571

Markus Stenberg of Cisco Systems, Inc. reported that a carefully
crafted DTLS message can cause a segmentation fault in OpenSSL due
to a NULL pointer dereference. A remote attacker could use this flaw
to mount a denial of service attack.

CVE-2014-3572

Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that an
OpenSSL client would accept a handshake using an ephemeral ECDH
ciphersuite if the server key exchange message is omitted. This
allows remote SSL servers to conduct ECDHE-to-ECDH downgrade attacks
and trigger a loss of forward secrecy.

CVE-2014-8275

Antti Karjalainen and Tuomo Untinen of the Codenomicon CROSS project
and Konrad Kraszewski of Google reported various certificate
fingerprint issues, which allow remote attackers to defeat a
fingerprint-based certificate-blacklist protection mechanism.

CVE-2015-0204

Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that
an OpenSSL client will accept the use of an ephemeral RSA key in a
non-export RSA key exchange ciphersuite, violating the TLS
standard. This allows remote SSL servers to downgrade the security
of the session.

CVE-2015-0205

Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that an
OpenSSL server will accept a DH certificate for client
authentication without the certificate verify message. This flaw
effectively allows a client to authenticate without the use of a
private key via crafted TLS handshake protocol traffic to a server
that recognizes a certification authority with DH support.

CVE-2015-0206

Chris Mueller discovered a memory leak in the dtls1_buffer_record
function. A remote attacker could exploit this flaw to mount a
denial of service through memory exhaustion by repeatedly sending
specially crafted DTLS records.

For the stable distribution (wheezy), these problems have been fixed in
version 1.0.1e-2+deb7u14.

For the upcoming stable distribution (jessie), these problems will be
fixed soon.

For the unstable distribution (sid), these problems have been fixed in
version 1.0.1k-1.

We recommend that you upgrade your openssl packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]