botan1.10 - security update

Several security vulnerabilities were found in botan1.10, a C++
library which provides support for many common cryptographic
operations, including encryption, authentication, X.509v3 certificates
and CRLs.

• CVE-2015-5726
  The BER decoder would crash due to reading from offset 0 of an
  empty vector if it encountered a BIT STRING which did not contain
  any data at all. This can be used to easily crash applications
  reading untrusted ASN.1 data, but does not seem exploitable for
  code execution.
• CVE-2015-5727
  The BER decoder would allocate a fairly arbitrary amount of memory
  in a length field, even if there was no chance the read request
  would succeed. This might cause the process to run out of memory or
  invoke the OOM killer.
• CVE-2015-7827
  Use constant time PKCS #1 unpadding to avoid possible side channel
  attack against RSA decryption
• CVE-2016-2194
  Infinite loop in modular square root algorithm.
  The ressol function implementing the Tonelli-Shanks algorithm for
  finding square roots could be sent into a nearly infinite loop due
  to a misplaced conditional check. This could occur if a composite
  modulus is provided, as this algorithm is only defined for primes.
  This function is exposed to attacker controlled input via the
  OS2ECP function during ECC point decompression.
• CVE-2016-2195
  Fix Heap overflow on invalid ECC point.
• CVE-2016-2849
  Use constant time modular inverse algorithm to avoid possible
  side channel attack against ECDSA.

For the stable distribution (jessie), these problems have been fixed in
version 1.10.8-2+deb8u1.

We recommend that you upgrade your botan1.10 packages.