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

Medium Nessus Plugin ID 58360

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 3.4

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: 1.11

Type: local

Published: 2012/03/16

Updated: 2020/09/23

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.4

CVSS v2.0

Base Score: 5

Temporal Score: 4.3

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

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

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 Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2012/03/15

Vulnerability Publication Date: 2012/03/12

Reference Information

CVE: CVE-2012-0884

BID: 52428