Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : openssl vulnerabilities (USN-2914-1)

Ubuntu Security Notice (C) 2016 Canonical, Inc. / NASL script (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing a security-related patch.

Description :

Yuval Yarom, Daniel Genkin, and Nadia Heninger discovered that OpenSSL
was vulnerable to a side-channel attack on modular exponentiation. On
certain CPUs, a local attacker could possibly use this issue to
recover RSA keys. This flaw is known as CacheBleed. (CVE-2016-0702)

Adam Langley discovered that OpenSSL incorrectly handled memory when
parsing DSA private keys. A remote attacker could use this issue to
cause OpenSSL to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2016-0705)

Guido Vranken discovered that OpenSSL incorrectly handled hex digit
calculation in the BN_hex2bn function. A remote attacker could use
this issue to cause OpenSSL to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2016-0797)

Emilia Kasper discovered that OpenSSL incorrectly handled memory when
performing SRP user database lookups. A remote attacker could possibly
use this issue to cause OpenSSL to consume memory, resulting in a
denial of service. (CVE-2016-0798)

Guido Vranken discovered that OpenSSL incorrectly handled memory when
printing very long strings. A remote attacker could use this issue to
cause OpenSSL to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2016-0799).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected libssl1.0.0 package.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 89078 ()

Bugtraq ID:

CVE ID: CVE-2016-0702
CVE-2016-0705
CVE-2016-0797
CVE-2016-0798
CVE-2016-0799

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