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CVE-2011-3210

Published: 22 September 2011

The ephemeral ECDH ciphersuite functionality in OpenSSL 0.9.8 through 0.9.8r and 1.0.x before 1.0.0e does not ensure thread safety during processing of handshake messages from clients, which allows remote attackers to cause a denial of service (daemon crash) via out-of-order messages that violate the TLS protocol.

Notes

AuthorNote
jdstrand
from upstream: applications are only affected by the CRL checking
vulnerability if they enable OpenSSL's internal CRL checking which is off by
default. For example by setting the verification flag X509_V_FLAG_CRL_CHECK
or X509_V_FLAG_CRL_CHECK_ALL
The following packages in main use this X509_V_FLAG_CRL_CHECK*
curl, dovecot, exim4, freeradius, ipsec-tools, krb5, libio-socket-ssl-perl,
libnet-ssleay-perl, likewise-open, mysql-5.1, nmap, openldap, openvpn,
postgresql-9.1, ruby1.8, squid, telepathy-gabble, telepathy-salut,
wpasupplicant
the above need to also support ECDH to be affected

Priority

Medium

Status

Package Release Status
openssl
Launchpad, Ubuntu, Debian
upstream
Released (1.0.0e)
hardy
Released (0.9.8g-4ubuntu3.15)
lucid
Released (0.9.8k-7ubuntu8.8)
maverick
Released (0.9.8o-1ubuntu4.6)
natty
Released (0.9.8o-5ubuntu1.2)
oneiric Not vulnerable
(1.0.0e-2ubuntu1)
Patches:
upstream: http://cvs.openssl.org/chngview?cn=21334 (0.9.8)
upstream: http://cvs.openssl.org/chngview?cn=21335 (1.0.0)