Ubuntu Security Notice USN-3512-1
11th December, 2017
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
Several security issues were fixed in OpenSSL.
- openssl - Secure Socket Layer (SSL) cryptographic library and tools
David Benjamin discovered that OpenSSL did not correctly prevent
buggy applications that ignore handshake errors from subsequently calling
certain functions. (CVE-2017-3737)
It was discovered that OpenSSL incorrectly performed the x86_64 Montgomery
multiplication procedure. While unlikely, a remote attacker could possibly
use this issue to recover private keys. (CVE-2017-3738)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 17.10:
- libssl1.0.0 1.0.2g-1ubuntu13.3
- Ubuntu 17.04:
- libssl1.0.0 1.0.2g-1ubuntu11.4
- Ubuntu 16.04 LTS:
- libssl1.0.0 1.0.2g-1ubuntu4.10
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.