[ GLSA 200912-01 ] OpenSSL: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: OpenSSL: Multiple vulnerabilities (GLSA 200912-01)
Severity: normal
Exploitable: remote
Date: December 01, 2009
Updated: December 02, 2009
Bug(s): #270305, #280591, #292022
ID: 200912-01

Synopsis


Multiple vulnerabilities in OpenSSL might allow remote attackers to conduct
multiple attacks, including the injection of arbitrary data into encrypted
byte streams.


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: < 0.9.8l-r2
Unaffected: >= 0.9.8l-r2
Architectures: All supported architectures


Description


Multiple vulnerabilities have been reported in OpenSSL:

• Marsh Ray of PhoneFactor and Martin Rex of SAP independently
  reported that the TLS protocol does not properly handle session
  renegotiation requests (CVE-2009-3555).
• The MD2 hash algorithm is no longer considered to be
  cryptographically strong, as demonstrated by Dan Kaminsky. Certificates
  using this algorithm are no longer accepted (CVE-2009-2409).
• Daniel Mentz and Robin Seggelmann reported the following
  vulnerabilities related to DTLS: A use-after-free flaw (CVE-2009-1379)
  and a NULL pointer dereference (CVE-2009-1387) in the
  dtls1_retrieve_buffered_fragment() function in src/d1_both.c, multiple
  memory leaks in the dtls1_process_out_of_seq_message() function in
  src/d1_both.c (CVE-2009-1378), and a processing error related to a
  large amount of DTLS records with a future epoch in the
  dtls1_buffer_record() function in ssl/d1_pkt.c
  (CVE-2009-1377).

Impact


A remote unauthenticated attacker, acting as a Man in the Middle, could
inject arbitrary plain text into a TLS session, possibly leading to the
ability to send requests as if authenticated as the victim. A remote
attacker could furthermore send specially crafted DTLS packages to a
service using OpenSSL for DTLS support, possibly resulting in a Denial
of Service. Also, a remote attacker might be able to create rogue
certificates, facilitated by a MD2 collision. NOTE: The amount of
computation needed for this attack is still very large.


Workaround


There is no known workaround at this time.


Resolution


All OpenSSL users should upgrade to the latest version: