Scientific Linux Security Update : openssl on SL6.x, SL7.x i386/x86_64 (DROWN)

This script is Copyright (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

A padding oracle flaw was found in the Secure Sockets Layer version
2.0 (SSLv2) protocol. An attacker can potentially use this flaw to
decrypt RSA-encrypted cipher text from a connection using a newer
SSL/TLS protocol version, allowing them to decrypt such connections.
This cross-protocol attack is publicly referred to as DROWN.
(CVE-2016-0800)

A flaw was found in the way malicious SSLv2 clients could negotiate
SSLv2 ciphers that have been disabled on the server. This could result
in weak SSLv2 ciphers being used for SSLv2 connections, making them
vulnerable to man-in-the-middle attacks. (CVE-2015-3197)

A side-channel attack was found that makes use of cache-bank conflicts
on the Intel Sandy-Bridge microarchitecture. An attacker who has the
ability to control code in a thread running on the same hyper-threaded
core as the victim's thread that is performing decryption, could use
this flaw to recover RSA private keys. (CVE-2016-0702)

A double-free flaw was found in the way OpenSSL parsed certain
malformed DSA (Digital Signature Algorithm) private keys. An attacker
could create specially crafted DSA private keys that, when processed
by an application compiled against OpenSSL, could cause the
application to crash. (CVE-2016-0705)

An integer overflow flaw, leading to a NULL pointer dereference or a
heap- based memory corruption, was found in the way some BIGNUM
functions of OpenSSL were implemented. Applications that use these
functions with large untrusted input could crash or, potentially,
execute arbitrary code. (CVE-2016-0797)

For the update to take effect, all services linked to the OpenSSL
library must be restarted, or the system rebooted.

See also :

http://www.nessus.org/u?c52e6e8e

Solution :

Update the affected packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 89075 ()

Bugtraq ID:

CVE ID: CVE-2015-3197
CVE-2016-0702
CVE-2016-0705
CVE-2016-0797
CVE-2016-0800

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