AIX OpenSSL Advisory : openssl_advisory16.asc (SLOTH)

Medium Nessus Plugin ID 88591

Synopsis

The remote AIX host has a version of OpenSSL installed that is affected by a collision-based forgery vulnerability.

Description

The remote AIX host has a version of OpenSSL installed that is affected by a collision-based forgery vulnerability, known as SLOTH (Security Losses from Obsolete and Truncated Transcript Hashes), in the TLS protocol due to accepting RSA-MD5 signatures in the server signature within the TLS 1.2 ServerKeyExchange messages during a TLS handshake. A man-in-the-middle attacker can exploit this, via a transcript collision attack, to impersonate a TLS server.

Solution

A fix is available and can be downloaded from the IBM AIX website.

See Also

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory16.asc

http://www.mitls.org/downloads/transcript-collisions.pdf

http://www.mitls.org/pages/attacks/SLOTH

Plugin Details

Severity: Medium

ID: 88591

File Name: aix_openssl_advisory16.nasl

Version: $Revision: 1.3 $

Type: local

Published: 2016/02/05

Modified: 2016/05/04

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 4.3

Temporal Score: 3.7

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

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

Vulnerability Information

CPE: cpe:/o:ibm:aix, cpe:/a:openssl:openssl

Required KB Items: Host/AIX/lslpp, Host/local_checks_enabled, Host/AIX/version

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/01/29

Vulnerability Publication Date: 2015/12/24

Reference Information

CVE: CVE-2015-7575

BID: 79684

OSVDB: 132305