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RHEL 6 / 7 : openssl (RHSA-2015:0066)
medium Nessus Plugin ID 80879
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Synopsis
The remote Red Hat host is missing one or more security updates for openssl.Description
The remote Redhat Enterprise Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2015:0066 advisory.OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL), Transport Layer Security (TLS), and Datagram Transport Layer Security (DTLS) protocols, as well as a full-strength, general purpose cryptography library.
A NULL pointer dereference flaw was found in the DTLS implementation of OpenSSL. A remote attacker could send a specially crafted DTLS message, which would cause an OpenSSL server to crash. (CVE-2014-3571)
A memory leak flaw was found in the way the dtls1_buffer_record() function of OpenSSL parsed certain DTLS messages. A remote attacker could send multiple specially crafted DTLS messages to exhaust all available memory of a DTLS server. (CVE-2015-0206)
It was found that OpenSSL's BigNumber Squaring implementation could produce incorrect results under certain special conditions. This flaw could possibly affect certain OpenSSL library functionality, such as RSA blinding. Note that this issue occurred rarely and with a low probability, and there is currently no known way of exploiting it. (CVE-2014-3570)
It was discovered that OpenSSL would perform an ECDH key exchange with a non-ephemeral key even when the ephemeral ECDH cipher suite was selected.
A malicious server could make a TLS/SSL client using OpenSSL use a weaker key exchange method than the one requested by the user. (CVE-2014-3572)
It was discovered that OpenSSL would accept ephemeral RSA keys when using non-export RSA cipher suites. A malicious server could make a TLS/SSL client using OpenSSL use a weaker key exchange method. (CVE-2015-0204)
Multiple flaws were found in the way OpenSSL parsed X.509 certificates.
An attacker could use these flaws to modify an X.509 certificate to produce a certificate with a different fingerprint without invalidating its signature, and possibly bypass fingerprint-based blacklisting in applications. (CVE-2014-8275)
It was found that an OpenSSL server would, under certain conditions, accept Diffie-Hellman client certificates without the use of a private key.
An attacker could use a user's client certificate to authenticate as that user, without needing the private key. (CVE-2015-0205)
All OpenSSL users are advised to upgrade to these updated packages, which contain a backported patch to mitigate the above issues. For the update to take effect, all services linked to the OpenSSL library (such as httpd and other SSL-enabled services) must be restarted or the system rebooted.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL openssl package based on the guidance in RHSA-2015:0066.See Also
http://www.nessus.org/u?07efafb0
https://www.openssl.org/news/secadv_20150108.txt
https://access.redhat.com/errata/RHSA-2015:0066
https://access.redhat.com/security/updates/classification/#moderate
https://bugzilla.redhat.com/show_bug.cgi?id=1180184
https://bugzilla.redhat.com/show_bug.cgi?id=1180185
https://bugzilla.redhat.com/show_bug.cgi?id=1180187
https://bugzilla.redhat.com/show_bug.cgi?id=1180234
https://bugzilla.redhat.com/show_bug.cgi?id=1180235
Plugin Details
Severity: Medium
ID: 80879
File Name: redhat-RHSA-2015-0066.nasl
Version: 1.25
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 1/21/2015
Updated: 11/4/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.2
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2015-0205
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2015-0204
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:openssl-devel, p-cpe:/a:redhat:enterprise_linux:openssl-libs, p-cpe:/a:redhat:enterprise_linux:openssl-static, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:openssl, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:openssl-perl
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 1/21/2015
Vulnerability Publication Date: 1/9/2015
Reference Information
CVE: CVE-2014-3570, CVE-2014-3571, CVE-2014-3572, CVE-2014-8275, CVE-2015-0204, CVE-2015-0205, CVE-2015-0206
BID: 71936