USN-3512-1: OpenSSL vulnerabilities

Releases

• Ubuntu 17.10
• Ubuntu 17.04
• Ubuntu 16.04 ESM

Packages

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

Details

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)

Update instructions

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

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

• libssl1.0.0 - 1.0.2g-1ubuntu4.10

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

References

• CVE-2017-3737
• CVE-2017-3738