[SECURITY] [DLA 247-1] openssl security update

2015-06-17T21:47:09
ID DEBIAN:DLA-247-1:99960
Type debian
Reporter Debian
Modified 2015-06-17T21:47:09

Description

Package : openssl Version : 0.9.8o-4squeeze21 CVE ID : CVE-2014-8176 CVE-2015-1789 CVE-2015-1790 CVE-2015-1791 CVE-2015-1792 CVE-2015-4000

Multiple vulnerabilities were discovered in OpenSSL, a Secure Sockets Layer toolkit.

CVE-2014-8176

Praveen Kariyanahalli, Ivan Fratric and Felix Groebert discovered
that an invalid memory free could be triggered when buffering DTLS
data. This could allow remote attackers to cause a denial of service
(crash) or potentially execute arbitrary code. This issue only
affected the oldstable distribution (wheezy).

CVE-2015-1789

Robert Swiecki and Hanno B??ck discovered that the X509_cmp_time
function could read a few bytes out of bounds. This could allow remote
attackers to cause a denial of service (crash) via crafted
certificates and CRLs.

CVE-2015-1790

Michal Zalewski discovered that the PKCS#7 parsing code did not
properly handle missing content which could lead to a NULL pointer
dereference. This could allow remote attackers to cause a denial of
service (crash) via crafted ASN.1-encoded PKCS#7 blobs.

CVE-2015-1791

Emilia K??sper discovered that a race condition could occur due to
incorrect handling of NewSessionTicket in a multi-threaded client,
leading to a double free. This could allow remote attackers to cause
a denial of service (crash).

CVE-2015-1792

Johannes Bauer discovered that the CMS code could enter an infinite
loop when verifying a signedData message, if presented with an
unknown hash function OID. This could allow remote attackers to cause
a denial of service.

Additionally OpenSSL will now reject handshakes using DH parameters shorter than 768 bits as a countermeasure against the Logjam attack (CVE-2015-4000).