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トップ  >  Linux14歩  >  2014-08-08 openssl(source)のupdate
20140808 openssl-1.0.1iにupdateしました


OpenSSL CHANGES

Changes between 1.0.1h and 1.0.1i [6 Aug 2014]

. Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
  SRP code can be overrun an internal buffer. Add sanity check that
  g, A, B < N to SRP code.

  Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
  Group for discovering this issue.
  (CVE-2014-3512)
  [Steve Henson]

. A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
  TLS 1.0 instead of higher protocol versions when the ClientHello message
  is badly fragmented. This allows a man-in-the-middle attacker to force a
  downgrade to TLS 1.0 even if both the server and the client support a
  higher protocol version, by modifying the client's TLS records.

  Thanks to David Benjamin and Adam Langley (Google) for discovering and
  researching this issue.
  (CVE-2014-3511)
  [David Benjamin]

. OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
  to a denial of service attack. A malicious server can crash the client
  with a null pointer dereference (read) by specifying an anonymous (EC)DH
  ciphersuite and sending carefully crafted handshake messages.

  Thanks to Felix Gröbert (Google) for discovering and researching this
  issue.
  (CVE-2014-3510)
  [Emilia Käsper]

. By sending carefully crafted DTLS packets an attacker could cause openssl
  to leak memory. This can be exploited through a Denial of Service attack.
  Thanks to Adam Langley for discovering and researching this issue.
  (CVE-2014-3507)
  [Adam Langley]

. An attacker can force openssl to consume large amounts of memory whilst
  processing DTLS handshake messages. This can be exploited through a
  Denial of Service attack.
  Thanks to Adam Langley for discovering and researching this issue.
  (CVE-2014-3506)
  [Adam Langley]

. An attacker can force an error condition which causes openssl to crash
  whilst processing DTLS packets due to memory being freed twice. This
  can be exploited through a Denial of Service attack.
  Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
  this issue.
  (CVE-2014-3505)
  [Adam Langley]

. If a multithreaded client connects to a malicious server using a resumed
  session and the server sends an ec point format extension it could write
  up to 255 bytes to freed memory.

  Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
  issue.
  [Gabor Tyukasz]

. A malicious server can crash an OpenSSL client with a null pointer
  dereference (read) by specifying an SRP ciphersuite even though it was not
  properly negotiated with the client. This can be exploited through a
  Denial of Service attack.

  Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
  discovering and researching this issue.
  (CVE-2014-5139)
  [Steve Henson]

. A flaw in OBJ_obj2txt may cause pretty printing functions such as
  X509_name_oneline, X509_name_print_ex et al. to leak some information
  from the stack. Applications may be affected if they echo pretty printing
  output to the attacker.

  Thanks to Ivan Fratric (Google) for discovering this issue.
  (CVE-2014-3508)
  [Emilia Käsper, and Steve Henson]

. Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
  for corner cases. (Certain input points at infinity could lead to
  bogus results, with non-infinity inputs mapped to infinity too.)
  [Bodo Moeller]
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