IBM DB2 10.5 < Fix Pack 7 Multiple Vulnerabilities (Linux) (Bar Mitzvah) (FREAK) (Logjam)

Medium Nessus Plugin ID 87764

Synopsis

The remote database server is affected by multiple vulnerabilities.

Description

According to its version, the installation of IBM DB2 10.5 running on the remote host is prior to Fix Pack 7. It is, therefore, affected by the following vulnerabilities :

- A security feature bypass vulnerability, known as FREAK (Factoring attack on RSA-EXPORT Keys), exists due to the support of weak EXPORT_RSA cipher suites with keys less than or equal to 512 bits. A man-in-the-middle attacker may be able to downgrade the SSL/TLS connection to use EXPORT_RSA cipher suites which can be factored in a short amount of time, allowing the attacker to intercept and decrypt the traffic. (CVE-2015-0204)

- A denial of service vulnerability exists when processing an ECParameters structure due to an infinite loop that occurs when a specified curve is over a malformed binary polynomial field. A remote attacker can exploit this to perform a denial of service against any system that processes public keys, certificate requests, or certificates. This includes TLS clients and TLS servers with client authentication enabled. (CVE-2015-1788)

- A privilege escalation vulnerability exists due to an untrusted search path flaw. A local attacker can exploit this, via a specially crafted library that is loaded by a setuid or setgid process, to gain elevated privileges on the system. (CVE-2015-1947)

- A security feature bypass vulnerability exists, known as Bar Mitzvah, due to improper combination of state data with key data by the RC4 cipher algorithm during the initialization phase. A man-in-the-middle attacker can exploit this, via a brute-force attack using LSB values, to decrypt the traffic. (CVE-2015-2808)

- A man-in-the-middle vulnerability, known as Logjam, exists due to a flaw in the SSL/TLS protocol. A remote attacker can exploit this flaw to downgrade connections using ephemeral Diffie-Hellman key exchange to 512-bit export-grade cryptography. (CVE-2015-4000)

Note that several of these vulnerabilities are due to the bundled GSKit component and the embedded FCM 4.1 libraries.

Solution

Apply IBM DB2 version 10.5 Fix Pack 7 or later.

See Also

https://www-01.ibm.com/support/docview.wss?uid=swg21647054#7

https://www-01.ibm.com/support/docview.wss?uid=swg1IT07394

https://www-01.ibm.com/support/docview.wss?uid=swg1IT08753

https://www-01.ibm.com/support/docview.wss?uid=swg1IT09900

https://www-01.ibm.com/support/docview.wss?uid=swg1IT09964

https://www-01.ibm.com/support/docview.wss?uid=swg1IT09969

http://www.nessus.org/u?4bbf45ac

https://www.smacktls.com/#freak

https://weakdh.org/

Plugin Details

Severity: Medium

ID: 87764

File Name: db2_105fp7_nix.nasl

Version: 1.11

Type: local

Family: Databases

Published: 2016/01/06

Updated: 2018/11/15

Dependencies: 86653

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.9

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:U/RL:TF/RC:C

CVSS v3.0

Base Score: 7.4

Temporal Score: 6.5

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:T/RC:C

Vulnerability Information

CPE: cpe:/a:ibm:db2

Required KB Items: installed_sw/DB2 Server

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/12/30

Vulnerability Publication Date: 2015/01/06

Reference Information

CVE: CVE-2015-0204, CVE-2015-1788, CVE-2015-1947, CVE-2015-2808, CVE-2015-4000

BID: 71936, 73684, 74733, 75158, 79693

CERT: 243585