[Bug 1672694] [NEW] Sync mbedtls 2.4.2-1 (universe) from Debian unstable (main)

Tue Mar 14 11:38:08 UTC 2017

You have been subscribed to a public bug by James Cowgill (jcowgill):

Please sync mbedtls 2.4.2-1 (universe) from Debian unstable (main)

mbed TLS 2.4.2 contains a fix for CVE-2017-2748 which should be in zesty
(LP #1672686). It also contains a number of other bugfixes.

Upstream changelog:

= mbed TLS 2.4.2 branch released 2017-03-08

Security
   * Add checks to prevent signature forgeries for very large messages while
     using RSA through the PK module in 64-bit systems. The issue was caused by
     some data loss when casting a size_t to an unsigned int value in the
     functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and
     mbedtls_pk_sign(). Found by Jean-Philippe Aumasson.
   * Fixed potential livelock during the parsing of a CRL in PEM format in
     mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing
     characters after the footer could result in the execution of an infinite
     loop. The issue can be triggered remotely. Found by Greg Zaverucha,
     Microsoft.
   * Removed MD5 from the allowed hash algorithms for CertificateRequest and
     CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2.
     Introduced by interoperability fix for #513.
   * Fixed a bug that caused freeing a buffer that was allocated on the stack,
     when verifying the validity of a key on secp224k1. This could be
     triggered remotely for example with a maliciously constructed certificate
     and potentially could lead to remote code execution on some platforms.
     Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos
     team. #569 CVE-2017-2784

Bugfix
   * Fix output certificate verification flags set by x509_crt_verify_top() when
     traversing a chain of trusted CA. The issue would cause both flags,
     MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be
     set when the verification conditions are not met regardless of the cause.
     Found by Harm Verhagen and inestlerode. #665 #561
   * Fix the redefinition of macro ssl_set_bio to an undefined symbol
     mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it.
     Found by omlib-lin. #673
   * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and
     x509_csr.c that are reported when building mbed TLS with a config.h that
     does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562
   * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that
     would compare 64 bits of the record counter instead of 48 bits as indicated
     in RFC 6347 Section 4.3.1. This could cause the execution of the
     renegotiation routines at unexpected times when the protocol is DTLS. Found
     by wariua. #687
   * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing
     the input string in PEM format to extract the different components. Found
     by Eyal Itkin.
   * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could
     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
   * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could
     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
   * Fixed potential arithmetic overflow in mbedtls_md2_update() that could
     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
   * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could
     cause buffer bound checks to be bypassed. Found by Eyal Itkin.
   * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng
     Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America.
   * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused
     by missing calls to mbedtls_pem_free() in cases when a
     MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and
     fix proposed by Guido Vranken. #722
   * Fixed the templates used to generate project and solution files for Visual
     Studio 2015 as well as the files themselves, to remove a build warning
     generated in Visual Studio 2015. Reported by Steve Valliere. #742
   * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C.
     Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771
   * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI
     number to write in hexadecimal is negative and requires an odd number of
     digits. Found and fixed by Guido Vranken.
   * Fix unlisted DES configuration dependency in some pkparse test cases. Found
     by inestlerode. #555

= mbed TLS 2.4.1 branch released 2016-12-13

Changes
   * Update to CMAC test data, taken from - NIST Special Publication 800-38B -
     Recommendation for Block Cipher Modes of Operation: The CMAC Mode for
     Authentication – October  2016

Changelog entries since current zesty version 2.4.0-1:

mbedtls (2.4.2-1) unstable; urgency=high

  * New upstream version.
    - Fixes CVE-2017-2784 - freeing of memory allocated on the stack when
      validating a public key with a secp224k1 curve. (Closes: #857560)

  * debian/rules:
    - Run testsuite inside faketime to prevent it suddenly failing in the
      future. Thanks Niels Thykier!

 -- James Cowgill <jcowgill at debian.org>  Tue, 14 Mar 2017 10:54:33 +0000

** Affects: mbedtls (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Sync mbedtls 2.4.2-1 (universe) from Debian unstable (main)
https://bugs.launchpad.net/bugs/1672694
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