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FreeBSD : OpenSSL -- CMS and S/MIME Bleichenbacher attack (60eb344e-6eb1-11e1-8ad7-00e0815b8da8)

medium Nessus Plugin ID 58360

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

The OpenSSL Team reports :

A weakness in the OpenSSL CMS and PKCS #7 code can be exploited using Bleichenbacher's attack on PKCS #1 v1.5 RSA padding also known as the million message attack (MMA).

Only users of CMS, PKCS #7, or S/MIME decryption operations are affected. A successful attack needs on average 2^20 messages. In practice only automated systems will be affected as humans will not be willing to process this many messages.

SSL/TLS applications are *NOT* affected by this problem since the SSL/TLS code does not use the PKCS#7 or CMS decryption code.

Solution

Update the affected package.

See Also

https://www.openssl.org/news/secadv/20120312.txt

http://www.nessus.org/u?8a084189

Plugin Details

Severity: Medium

ID: 58360

File Name: freebsd_pkg_60eb344e6eb111e18ad700e0815b8da8.nasl

Version: 1.12

Type: local

Published: 3/16/2012

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.4

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:openssl, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 3/15/2012

Vulnerability Publication Date: 3/12/2012

Reference Information

CVE: CVE-2012-0884

BID: 52428