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[Bug Watch Updater <1672686@xxxxxxxxxxxxxxxxxx>]

** Changed in: polarssl (Debian)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1672686

Title:
  CVE-2017-2784 - Freeing of memory allocated on stack when validating a
  public key with a secp224k1 curve

Status in mbedtls package in Ubuntu:
  Fix Released
Status in polarssl package in Ubuntu:
  Incomplete
Status in mbedtls source package in Xenial:
  Fix Released
Status in polarssl source package in Xenial:
  Confirmed
Status in mbedtls source package in Yakkety:
  Fix Released
Status in polarssl source package in Yakkety:
  Confirmed
Status in mbedtls package in Debian:
  Fix Released
Status in polarssl package in Debian:
  Fix Released

Bug description:
  The following security bug was published for mbedtls:

  Freeing of memory allocated on stack when validating a public key with
  a secp224k1 curve

  [Vulnerability]
  If a malicious peer supplies a certificate with a specially crafted secp224k1 public key, then an attacker can cause the server or client to attempt to free block of memory held on stack.

  [Impact]
  Depending on the platform, this could result in a Denial of Service (client crash) or potentially could be exploited to allow remote code execution with the same privileges as the host application.

  [Resolution]
  Affected users should upgrade to mbed TLS 1.3.19, mbed TLS 2.1.7 or mbed TLS 2.4.2.

  https://tls.mbed.org/tech-updates/security-advisories/mbedtls-
  security-advisory-2017-01

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