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AIX OpenSSL Advisory : openssl_advisory12.asc (FREAK)
medium Nessus Plugin ID 81406
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Synopsis
The remote AIX host has a version of OpenSSL installed that is affected by multiple vulnerabilities.Description
The version of OpenSSL installed on the remote AIX host is affected by the following vulnerabilities :- The BIGNUM squaring (BN_sqr) implementation does not properly calculate the square of a BIGNUM value. This allows remote attackers to defeat cryptographic protection mechanisms. (CVE-2014-3570)
- A NULL pointer dereference flaw exists in the dtls1_get_record() function when handling DTLS messages.
A remote attacker, using a specially crafted DTLS message, can cause a denial of service. (CVE-2014-3571)
- A flaw exists with ECDH handshakes when using an ECDSA certificate without a ServerKeyExchange message. This allows a remote attacker to trigger a loss of forward secrecy from the ciphersuite. (CVE-2014-3572)
- A flaw exists when accepting non-DER variations of certificate signature algorithms and signature encodings due to a lack of enforcement of matches between signed and unsigned portions. A remote attacker, by including crafted data within a certificate's unsigned portion, can bypass fingerprint-based certificate-blacklist protection mechanisms. (CVE-2014-8275)
- 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 flaw exists when accepting DH certificates for client authentication without the CertificateVerify message.
This allows a remote attacker to authenticate to the service without a private key. (CVE-2015-0205)
- A memory leak occurs in dtls1_buffer_record when handling a saturation of DTLS records containing the same number sequence but for the next epoch. This allows a remote attacker to cause a denial of service.
(CVE-2015-0206)
Solution
A fix is available and can be downloaded from the AIX website.See Also
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory12.asc
https://www-01.ibm.com/marketing/iwm/iwm/web/preLogin.do?source=aixbp
Plugin Details
Severity: Medium
ID: 81406
File Name: aix_openssl_advisory12.nasl
Version: 1.16
Type: local
Family: AIX Local Security Checks
Published: 2/18/2015
Updated: 4/21/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.2
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
Vulnerability Information
CPE: cpe:/o:ibm:aix, cpe:/a:openssl:openssl
Required KB Items: Host/local_checks_enabled, Host/AIX/version, Host/AIX/lslpp
Exploit Ease: No known exploits are available
Patch Publication Date: 2/4/2015
Vulnerability Publication Date: 1/5/2015
Reference Information
CVE: CVE-2014-3570, CVE-2014-3571, CVE-2014-3572, CVE-2014-8275, CVE-2015-0204, CVE-2015-0205, CVE-2015-0206