Debian Security Advisory

DSA-3287-1 openssl -- security update

Date Reported:
13 Jun 2015
Affected Packages:
openssl
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2014-8176, CVE-2015-1788, CVE-2015-1789, CVE-2015-1790, CVE-2015-1791, CVE-2015-1792, CVE-2015-4000.
More information:

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-2015-1788

    Joseph Barr-Pixton discovered that an infinite loop could be triggered due to incorrect handling of malformed ECParameters structures. This could allow remote attackers to cause a denial of service.

  • CVE-2015-1789

    Robert Swiecki and Hanno Böck 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 Käsper 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).

For the oldstable distribution (wheezy), these problems have been fixed in version 1.0.1e-2+deb7u17.

For the stable distribution (jessie), these problems have been fixed in version 1.0.1k-3+deb8u1.

For the testing distribution (stretch), these problems have been fixed in version 1.0.2b-1.

For the unstable distribution (sid), these problems have been fixed in version 1.0.2b-1.

We recommend that you upgrade your openssl packages.