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[ GLSA 201203-12 ] OpenSSL: Multiple vulnerabilities
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GLSA
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PostPosted: Tue Mar 06, 2012 12:26 pm    Post subject: [ GLSA 201203-12 ] OpenSSL: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: OpenSSL: Multiple vulnerabilities (GLSA 201203-12)
Severity: normal
Exploitable: remote
Date: March 06, 2012
Updated: July 07, 2014
Bug(s): #397695, #399365
ID: 201203-12

Synopsis

Multiple vulnerabilities have been found in OpenSSL, allowing
remote attackers to cause a Denial of Service or obtain sensitive
information.


Background

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.


Affected Packages

Package: dev-libs/openssl
Vulnerable: < 1.0.0g
Unaffected: >= 1.0.0g
Unaffected: >= 0.9.8t < 0.9.9
Unaffected: >= 0.9.8u < 0.9.9
Unaffected: >= 0.9.8v < 0.9.9
Unaffected: >= 0.9.8w < 0.9.9
Unaffected: >= 0.9.8x < 0.9.9
Unaffected: >= 0.9.8y < 0.9.9
Unaffected: >= 0.9.8z_p1 < 0.9.9
Unaffected: >= 0.9.8z_p2 < 0.9.9
Unaffected: >= 0.9.8z_p3 < 0.9.9
Unaffected: >= 0.9.8z_p4 < 0.9.9
Unaffected: >= 0.9.8z_p5 < 0.9.9
Architectures: All supported architectures


Description

Multiple vulnerabilities have been found in OpenSSL:
  • Timing differences for decryption are exposed by CBC mode encryption
    in OpenSSL’s implementation of DTLS (CVE-2011-4108).
  • A policy check failure can result in a double-free error when
    X509_V_FLAG_POLICY_CHECK is set (CVE-2011-4109).
  • Clients and servers using SSL 3.0 handshakes do not clear the block
    cipher padding, allowing a record to contain up to 15 bytes of
    uninitialized memory, which could include sensitive information
    (CVE-2011-4576).
  • Assertion errors can occur during the handling of malformed X.509
    certificates when OpenSSL is built with RFC 3779 support
    (CVE-2011-4577).
  • A resource management error can occur when OpenSSL’s server gated
    cryptography (SGC) does not properly handle handshake restarts
    (CVE-2011-4619).
  • Invalid parameters in the GOST block cipher are not properly handled
    by the GOST ENGINE(CVE-2012-0027).
  • An incorrect fix for CVE-2011-4108 creates an unspecified
    vulnerability for DTLS applications using OpenSSL (CVE-2012-0050).


Impact

A remote attacker may be able to cause a Denial of Service or obtain
sensitive information, including plaintext passwords.


Workaround

There is no known workaround at this time.

Resolution

All OpenSSL users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.0g"
   


References

CVE-2011-4108
CVE-2011-4109
CVE-2011-4576
CVE-2011-4577
CVE-2011-4619
CVE-2012-0027
[url=http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0050 ]
CVE-2012-0050
[/url]


Last edited by GLSA on Tue Jul 08, 2014 4:29 am; edited 6 times in total
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