FreeBSD : openssl -- potential SSL 2.0 rollback (60e26a40-3b25-11da-9484-00123ffe8333)

Medium Nessus Plugin ID 21435


The remote FreeBSD host is missing one or more security-related updates.


Vulnerability :

Such applications are affected if they use the option SSL_OP_MSIE_SSLV2_RSA_PADDING. This option is implied by use of SSL_OP_ALL, which is intended to work around various bugs in third-party software that might prevent interoperability. The SSL_OP_MSIE_SSLV2_RSA_PADDING option disables a verification step in the SSL 2.0 server supposed to prevent active protocol-version rollback attacks. With this verification step disabled, an attacker acting as a 'man in the middle' can force a client and a server to negotiate the SSL 2.0 protocol even if these parties both support SSL 3.0 or TLS 1.0. The SSL 2.0 protocol is known to have severe cryptographic weaknesses and is supported as a fallback only.

Applications using neither SSL_OP_MSIE_SSLV2_RSA_PADDING nor SSL_OP_ALL are not affected. Also, applications that disable use of SSL 2.0 are not affected.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 21435

File Name: freebsd_pkg_60e26a403b2511da948400123ffe8333.nasl

Version: $Revision: 1.12 $

Type: local

Published: 2006/05/13

Modified: 2015/09/02

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:compat5x-alpha, p-cpe:/a:freebsd:freebsd:compat5x-amd64, p-cpe:/a:freebsd:freebsd:compat5x-i386, p-cpe:/a:freebsd:freebsd:compat5x-sparc64, p-cpe:/a:freebsd:freebsd:openssl, p-cpe:/a:freebsd:freebsd:openssl-beta, p-cpe:/a:freebsd:freebsd:openssl-beta-overwrite-base, p-cpe:/a:freebsd:freebsd:openssl-overwrite-base, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 2005/10/12

Vulnerability Publication Date: 2005/10/11

Reference Information

CVE: CVE-2005-2969

OSVDB: 19919

FreeBSD: SA-05:21.openssl