-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 OpenSSL Security Advisory [6 September 2011]
Two security flaws have been fixed in OpenSSL 1.0.0e CRL verification vulnerability in OpenSSL ========================================= Under certain circumstances OpenSSL's internal certificate verification routines can incorrectly accept a CRL whose nextUpdate field is in the past. (CVE-2011-3207) This issue applies to OpenSSL versions 1.0.0 through 1.0.0d. Versions of OpenSSL before 1.0.0 are not affected. Users of affected versions of OpenSSL should update to the OpenSSL 1.0.0e release, which contains a patch to correct this issue. Thanks to Kaspar Brand <o...@velox.ch> for identifying this bug and suggesting a fix. TLS ephemeral ECDH crashes in OpenSSL ===================================== OpenSSL server code for ephemeral ECDH ciphersuites is not thread-safe, and furthermore can crash if a client violates the protocol by sending handshake messages in incorrect order. (CVE-2011-3210) This issue applies to OpenSSL 0.9.8 through 0.9.8s (experimental "ECCdraft" ciphersuites) and to OpenSSL 1.0.0 through 1.0.0d. Affected users of OpenSSL should update to the OpenSSL 1.0.0e release, which contains a patch to correct this issue. If you cannot immediately upgrade, we recommend that you disable ephemeral ECDH ciphersuites if you have enabled them. Thanks to Adam Langley <a...@chromium.org> for identifying and fixing this issue. Which applications are affected =============================== 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. Applications which use their own custom CRL checking (such as Apache) are not affected. Only server-side applications that specifically support ephemeral ECDH ciphersuites are affected by the ephemeral ECDH crash bug and only if ephemeral ECDH ciphersuites are enabled in the configuration. You can check to see if application supports ephemeral ECDH ciphersuites by looking for SSL_CTX_set_tmp_ecdh, SSL_set_tmp_ecdh, SSL_CTRL_SET_TMP_ECDH, SSL_CTX_set_tmp_ecdh_callback, SSL_set_tmp_ecdh_callback, SSL_CTRL_SET_TMP_ECDH_CB in the source code. References ========== URL for this Security Advisory: http://www.openssl.org/news/secadv_20110906.txt -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEVAwUBTmYhWqLSm3vylcdZAQKsnQgAsD+GwbfpXuZyhLNcHrJjTiHgfVWQLiFq 6RupYmgfxPiCrGdSEvp6Uh3Y+bcOOoDXTXujk7T6RTRU4iYiARFkXo8bUtH47dWO AfwOyMxiM88G9TYj69RUjKNP70j1rEATIz+m4kpnDgmmsodDNsPj56k4gptsoELc S4Cb4+97uCBv1mkVFgvu71RVXbIwqOMt/vveHUttQQLEcdu2XcUylbMarDaOcZui e9AjYX3LoqdhPRl2v01tuJf3c8wmNTE+GtsO8hwda6eo8Mu/BAnqtFsiFRVjmJ2M vgj1Ot/SPQHcpDu7N3V3GY4tdY8iDHWZ5FfbyaoXvzM6guS+o4cDww== =xfeL -----END PGP SIGNATURE----- ______________________________________________________________________ OpenSSL Project http://www.openssl.org Announcement Mailing List openssl-announce@openssl.org Automated List Manager majord...@openssl.org
