U radu programskog paketa OpenSSL uočeno je i ispravljeno više sigurnosnih propusta. Udaljeni napadač je spomenute propuste mogao iskoristiti za otkrivanje osjetljivih podataka, proizvoljno pokretanje programskog koda te za DoS (eng. Denial of Service) napad.

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Debian Security Advisory DSA-2390-1                   Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
http://www.debian.org/security/                            Florian Weimer
January 15, 2012                       http://www.debian.org/security/faq
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Package        : openssl
Vulnerability  : several
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-4108 CVE-2011-4109 CVE-2011-4354
                 CVE-2011-4576 CVE-2011-4619

Several vulnerabilities were discovered in OpenSSL, an implementation
of TLS and related protocols.  The Common Vulnerabilities and
Exposures project identifies the following vulnerabilities:

CVE-2011-4108
	The DTLS implementation performs a MAC check only if certain
	padding is valid, which makes it easier for remote attackers
	to recover plaintext via a padding oracle attack.

CVE-2011-4109 
	A double free vulnerability when X509_V_FLAG_POLICY_CHECK is
	enabled, allows remote attackers to cause applications crashes
	and potentially allow execution of arbitrary code by
	triggering failure of a policy check.

CVE-2011-4354
	On 32-bit systems, the operations on NIST elliptic curves
	P-256 and P-384 are not correctly implemented, potentially
	leaking the private ECC key of a TLS server.  (Regular
	RSA-based keys are not affected by this vulnerability.)

CVE-2011-4576
	The SSL 3.0 implementation does not properly initialize data
	structures for block cipher padding, which might allow remote
	attackers to obtain sensitive information by decrypting the
	padding data sent by an SSL peer.

CVE-2011-4619
	The Server Gated Cryptography (SGC) implementation in OpenSSL
	does not properly handle handshake restarts, unnecessarily
	simplifying CPU exhaustion attacks.

For the oldstable distribution (lenny), these problems have been fixed
in version 0.9.8g-15+lenny15.

For the stable distribution (squeeze), these problems have been fixed
in version 0.9.8o-4squeeze5.

For the testing distribution (wheezy) and the unstable distribution
(sid), these problems have been fixed in version 1.0.0f-1.

We recommend that you upgrade your openssl packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
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--------------------------------------------------------------------------------
Fedora Update Notification
FEDORA-2012-0250
2012-01-07 22:28:09
--------------------------------------------------------------------------------

Name        : openssl
Product     : Fedora 15
Version     : 1.0.0f
Release     : 1.fc15
URL         : http://www.openssl.org/
Summary     : A general purpose cryptography library with TLS implementation
Description :
The OpenSSL toolkit provides support for secure communications between
machines. OpenSSL includes a certificate management tool and shared
libraries which provide various cryptographic algorithms and
protocols.

--------------------------------------------------------------------------------
Update Information:

New upstream package with bugfixes and fixes for moderate and low impact CVEs.

--------------------------------------------------------------------------------
ChangeLog:

* Thu Jan  5 2012 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0f-1
- new upstream release fixing multiple CVEs
* Tue Nov 22 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0e-4
- move the libraries needed for static linking to Libs.private
* Thu Nov  3 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0e-3
- do not use AVX instructions when osxsave bit not set
- add direct known answer tests for SHA2 algorithms
* Wed Sep 21 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0e-2
- fix missing initialization of variable in CHIL engine
* Wed Sep  7 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0e-1
- new upstream release fixing CVE-2011-3207 (#736088)
* Wed Aug 24 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-8
- drop the separate engine for Intel acceleration improvements
  and merge in the AES-NI, SHA1, and RC4 optimizations
- add support for OPENSSL_DISABLE_AES_NI environment variable
  that disables the AES-NI support
* Tue Jul 26 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-7
- correct openssl cms help output (#636266)
- more tolerant starttls detection in XMPP protocol (#608239)
* Wed Jul 20 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-6
- add support for newest Intel acceleration improvements backported
  from upstream by Intel in form of a separate engine
* Thu Jun  9 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-5
- allow the AES-NI engine in the FIPS mode
* Tue May 24 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-4
- add API necessary for CAVS testing of the new DSA parameter generation
* Thu Apr 28 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-3
- add support for VIA Padlock on 64bit arch from upstream (#617539)
- do not return bogus values from load_certs (#652286)
* Tue Apr  5 2011 Tomas Mraz <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> 1.0.0d-2
- clarify apps help texts for available digest algorithms (#693858)
--------------------------------------------------------------------------------
References:

  [ 1 ] Bug #771770 - CVE-2011-4108 openssl: DTLS plaintext recovery attack
        https://bugzilla.redhat.com/show_bug.cgi?id=771770
  [ 2 ] Bug #771775 - CVE-2011-4576 openssl: uninitialized SSL 3.0 padding
        https://bugzilla.redhat.com/show_bug.cgi?id=771775
  [ 3 ] Bug #771778 - CVE-2011-4577 openssl: malformed RFC 3779 data can cause
assertion failures
        https://bugzilla.redhat.com/show_bug.cgi?id=771778
  [ 4 ] Bug #771780 - CVE-2011-4619 openssl: SGC restart DoS attack
        https://bugzilla.redhat.com/show_bug.cgi?id=771780
--------------------------------------------------------------------------------

This update can be installed with the "yum" update program.  Use 
su -c 'yum update openssl' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
--------------------------------------------------------------------------------
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