USN-3475-1: OpenSSL vulnerabilities

Releases

• Ubuntu 17.10
• Ubuntu 17.04
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

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

Details

It was discovered that OpenSSL incorrectly parsed the IPAddressFamily
extension in X.509 certificates, resulting in an erroneous display of the
certificate in text format. (CVE-2017-3735)

It was discovered that OpenSSL incorrectly performed the x86_64 Montgomery
squaring procedure. While unlikely, a remote attacker could possibly use
this issue to recover private keys. This issue only applied to Ubuntu 16.04
LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-3736)

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-1ubuntu13.2

Ubuntu 17.04

• libssl1.0.0 - 1.0.2g-1ubuntu11.3

Ubuntu 16.04

• libssl1.0.0 - 1.0.2g-1ubuntu4.9

Ubuntu 14.04

• libssl1.0.0 - 1.0.1f-1ubuntu2.23

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

References

• CVE-2017-3735
• CVE-2017-3736

Related notices

• USN-3611-2: openssl, libssl1.0.0