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gentooGentoo FoundationGLSA-200912-01
HistoryDec 01, 2009 - 12:00 a.m.

OpenSSL: Multiple vulnerabilities

Gentoo Foundation

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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.


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).


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.


There is no known workaround at this time.


All OpenSSL users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8l-r2"
Gentooanyalldev-libs/openssl< 0.9.8l-r2UNKNOWN