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USN-3692-2: OpenSSL vulnerabilities

26 June 2018

Several security issues were fixed in OpenSSL.

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Releases

Packages

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

Details

USN-3692-1 fixed a vulnerability in OpenSSL. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key
generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)

Guido Vranken discovered that OpenSSL incorrectly handled very large prime
values during a key agreement. A remote attacker could possibly use this
issue to consume resources, leading to a denial of service. (CVE-2018-0732)

Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis
Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA key
generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private RSA keys. (CVE-2018-0737)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

Related notices

  • USN-3692-1: libssl1.0.0, libssl-doc, openssl, libssl1.0-dev, libssl1.1-udeb, libssl1.1, libssl1.0.0-udeb, libssl-dev, openssl1.0, libcrypto1.0.0-udeb, libcrypto1.1-udeb
  • USN-3689-2: libgcrypt11
  • USN-3689-1: libgcrypt20, libgcrypt20-doc, libgcrypt11, libgcrypt11-udeb, libgcrypt11-doc, libgcrypt11-dev, libgcrypt20-udeb, libgcrypt-mingw-w64-dev, libgcrypt20-dev
  • USN-3850-1: libnss3-tools, nss, libnss3-dev, libnss3, libnss3-nssdb, libnss3-1d
  • USN-3850-2: nss, libnss3
  • USN-3628-1: libssl1.0.0, libssl-doc, openssl, libssl-dev, libssl1.0.0-udeb, libcrypto1.0.0-udeb
  • USN-3628-2: libssl1.0.0, openssl