==========================================================================
Ubuntu Security Notice USN-2830-1
December 07, 2015
openssl vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 15.10
– Ubuntu 15.04
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in OpenSSL.
Software Description:
– openssl: Secure Socket Layer (SSL) cryptographic library and tools
Details:
Guy Leaver discovered that OpenSSL incorrectly handled a ServerKeyExchange
for an anonymous DH ciphersuite with the value of p set to 0. A remote
attacker could possibly use this issue to cause OpenSSL to crash, resulting
in a denial of service. This issue only applied to Ubuntu 15.10.
(CVE-2015-1794)
Hanno Böck discovered that the OpenSSL Montgomery squaring procedure
algorithm may produce incorrect results when being used on x86_64. A remote
attacker could possibly use this issue to break encryption. This issue only
applied to Ubuntu 15.10. (CVE-2015-3193)
Loïc Jonas Etienne discovered that OpenSSL incorrectly handled ASN.1
signatures with a missing PSS parameter. A remote attacker could possibly
use this issue to cause OpenSSL to crash, resulting in a denial of service.
(CVE-2015-3194)
Adam Langley discovered that OpenSSL incorrectly handled malformed
X509_ATTRIBUTE structures. A remote attacker could possibly use this issue
to cause OpenSSL to consume resources, resulting in a denial of service.
(CVE-2015-3195)
It was discovered that OpenSSL incorrectly handled PSK identity hints. A
remote attacker could possibly use this issue to cause OpenSSL to crash,
resulting in a denial of service. This issue only applied to Ubuntu 12.04
LTS, Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-3196)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 15.10:
libssl1.0.0 1.0.2d-0ubuntu1.2
Ubuntu 15.04:
libssl1.0.0 1.0.1f-1ubuntu11.5
Ubuntu 14.04 LTS:
libssl1.0.0 1.0.1f-1ubuntu2.16
Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.32
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2830-1
CVE-2015-1794, CVE-2015-3193, CVE-2015-3194, CVE-2015-3195,
CVE-2015-3196
Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.0.2d-0ubuntu1.2
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu11.5
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.16
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.32
—–BEGIN PGP SIGNATURE—–
Version: GnuPG v2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=barF
—–END PGP SIGNATURE—–
—
