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Mandriva Linux Security Advisory 2015-096

Mandriva Linux Security Advisory 2015-096
Posted Mar 30, 2015
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2015-096 - A flaw was found in the way stunnel, a socket wrapper which can provide SSL support to ordinary applications, performed initialization of PRNG after fork. When accepting a new connection, the server forks and the child process handles the request. The RAND_bytes() function of openssl doesn't reset its state after the fork, but seeds the PRNG with the output of time. The most important consequence is that servers using EC or DSA certificates may under certain conditions leak their private key. The updated packages fix this issue by using threads instead of new processes to handle connections. Also an issue has been corrected where the directory for the pid file was not being created when the package is installed. An issue currently exists in Mageia 4 where it fails trying to use FIPS SSL. This can be worked around by adding fips = no into the config.

tags | advisory
systems | linux, mandriva
advisories | CVE-2014-0016
SHA-256 | 7dce4ccd27d3ab24aaba38df63d58ff30f2afcc77eb744241fcc74995ab0f4ec

Mandriva Linux Security Advisory 2015-096

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

_______________________________________________________________________

Mandriva Linux Security Advisory MDVSA-2015:096
http://www.mandriva.com/en/support/security/
_______________________________________________________________________

Package : stunnel
Date : March 28, 2015
Affected: Business Server 2.0
_______________________________________________________________________

Problem Description:

Updated stunnel package fixes security vulnerability:

A flaw was found in the way stunnel, a socket wrapper which can provide
SSL support to ordinary applications, performed (re)initialization of
PRNG after fork. When accepting a new connection, the server forks and
the child process handles the request. The RAND_bytes() function of
openssl doesn't reset its state after the fork, but seeds the PRNG
with the output of time(NULL). The most important consequence is
that servers using EC (ECDSA) or DSA certificates may under certain
conditions leak their private key (CVE-2014-0016).

The updated packages fix this issue by using threads instead of new
processes to handle connections.

Also an issue has been corrected where the directory for the pid file
was not being created when the package is installed.

An issue currently exists in Mageia 4 where it fails trying to use
FIPS SSL (mga#13124). This can be worked around by adding fips =
no into the config.
_______________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0016
http://advisories.mageia.org/MGASA-2014-0144.html
_______________________________________________________________________

Updated Packages:

Mandriva Business Server 2/X86_64:
34c6ac327fa19ff94e3461e65b82518d mbs2/x86_64/stunnel-4.56-4.1.mbs2.x86_64.rpm
90de576bd2fb8b349c9fe373db32cac6 mbs2/SRPMS/stunnel-4.56-4.1.mbs2.src.rpm
_______________________________________________________________________

To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/en/support/security/advisories/

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
_______________________________________________________________________

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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