Debian DSA-3125-1 : openssl - security update (FREAK)

medium Nessus Plugin ID 80446

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Synopsis

The remote Debian host is missing a security-related update.

Description

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.

Solution

Upgrade the openssl packages.

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.

Plugin Details

Severity: Medium

ID: 80446

File Name: debian_DSA-3125.nasl

Version: 1.16

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 1/12/2015

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openssl, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 1/11/2015

Vulnerability Publication Date: 12/24/2014

Reference Information

CVE: CVE-2014-3569, CVE-2014-3570, CVE-2014-3571, CVE-2014-3572, CVE-2014-8275, CVE-2015-0204, CVE-2015-0205, CVE-2015-0206

BID: 71934, 71935, 71936, 71937, 71939, 71940, 71941, 71942

DSA: 3125

Detections

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