CentOS Update for openssl CESA-2016:1940 centos6

Published: 2016-10-05 10:13:10
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Detection Type:
Linux Distribution Package

Summary:
Check the version of openssl

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es): * A memory leak flaw was found in the way OpenSSL handled TLS status request extension data during session renegotiation. A remote attacker could cause a TLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory, if it enabled OCSP stapling support. (CVE-2016-6304) * It was discovered that OpenSSL did not always use constant time operations when computing Digital Signature Algorithm (DSA) signatures. A local attacker could possibly use this flaw to obtain a private DSA key belonging to another user or service running on the same system. (CVE-2016-2178) * It was discovered that the Datagram TLS (DTLS) implementation could fail to release memory in certain cases. A malicious DTLS client could cause a DTLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory. (CVE-2016-2179) * A flaw was found in the Datagram TLS (DTLS) replay protection implementation in OpenSSL. A remote attacker could possibly use this flaw to make a DTLS server using OpenSSL to reject further packets sent from a DTLS client over an established DTLS connection. (CVE-2016-2181) * An out of bounds write flaw was discovered in the OpenSSL BN_bn2dec() function. An attacker able to make an application using OpenSSL to process a large BIGNUM could cause the application to crash or, possibly, execute arbitrary code. (CVE-2016-2182) * A flaw was found in the DES/3DES cipher was used as part of the TLS/SSL protocol. A man-in-the-middle attacker could use this flaw to recover some plaintext data by capturing large amounts of encrypted traffic between TLS/SSL server and client if the communication used a DES/3DES based ciphersuite. (CVE-2016-2183) This update mitigates the CVE-2016-2183 issue by lowering priority of DES cipher suites so they are not preferred over cipher suites using AES. For compatibility reasons, DES cipher suites remain enabled by default and included in the set of cipher suites identified by the HIGH cipher string. Future updates may move them to MEDIUM or not enable them by default. * An integer underflow flaw leading to a buffer over-read was found in the way OpenSSL parsed TLS session tickets. A remote attacker could use this flaw to crash a TLS server using OpenSSL if it used SHA-512 as HMAC for session tickets. (CVE-2016-6302) * Multiple integer overflow f ... Description truncated, please see the referenced URL(s) for more information.

Affected Versions:
openssl on CentOS 6

Recommendations:
Please Install the Updated Packages.

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2016-2177
https://nvd.nist.gov/vuln/detail/CVE-2016-2178
https://nvd.nist.gov/vuln/detail/CVE-2016-2179
https://nvd.nist.gov/vuln/detail/CVE-2016-2180
https://nvd.nist.gov/vuln/detail/CVE-2016-2181
https://nvd.nist.gov/vuln/detail/CVE-2016-2182
https://nvd.nist.gov/vuln/detail/CVE-2016-6302
https://nvd.nist.gov/vuln/detail/CVE-2016-6304
https://nvd.nist.gov/vuln/detail/CVE-2016-6306
https://nvd.nist.gov/vuln/detail/CVE-2016-2183

References:

http://lists.centos.org/pipermail/centos-announce/2016-September/022098.html

Severity
High
CVSS Score
7.8
Published
2016-10-05
Modified
2019-03-08
Category
CentOS Local Security Checks

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