Detections
Analytics
AIX OpenSSL Advisory : openssl_advisory14.asc (Logjam)
high Nessus Plugin ID 84880
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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 multiple vulnerabilities :- An invalid free memory error exists due to improper validation of user-supplied input when a DTLS peer receives application data between ChangeCipherSpec and Finished messages. A remote attacker can exploit this to corrupt memory, resulting in a denial of service or the execution of arbitrary code. (CVE-2014-8176)
- 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 denial of service vulnerability exists due to improper validation of the content and length of the ASN1_TIME string by the X509_cmp_time() function. A remote attacker can exploit this, via a malformed certificate and CRLs of various sizes, to cause a segmentation fault, resulting in a denial of service condition. TLS clients that verify CRLs are affected. TLS clients and servers with client authentication enabled may be affected if they use custom verification callbacks.
(CVE-2015-1789)
- A NULL pointer dereference flaw exists in the PKCS#7 parsing code due to incorrect handling of missing inner 'EncryptedContent'. This allows a remote attacker, via specially crafted ASN.1-encoded PKCS#7 blobs with missing content, to cause a denial of service condition or other potential unspecified impacts. (CVE-2015-1790)
- A double-free error exists due to a race condition that occurs when a NewSessionTicket is received by a multi-threaded client when attempting to reuse a previous ticket. (CVE-2015-1791)
- A denial of service vulnerability exists in the CMS code due to an infinite loop that occurs when verifying a signedData message. A remote attacker can exploit this to cause a denial of service condition. (CVE-2015-1792)
- 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)
Solution
A fix is available and can be downloaded from the AIX website.See Also
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory14.asc
https://www-01.ibm.com/marketing/iwm/iwm/web/preLogin.do?source=aixbp
Plugin Details
Severity: High
ID: 84880
File Name: aix_openssl_advisory14.nasl
Version: 1.12
Type: local
Family: AIX Local Security Checks
Published: 7/20/2015
Updated: 4/21/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
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: 7/15/2015
Vulnerability Publication Date: 5/20/2015
Reference Information
CVE: CVE-2014-8176, CVE-2015-1788, CVE-2015-1789, CVE-2015-1790, CVE-2015-1791, CVE-2015-1792, CVE-2015-4000