USN-3850-1: NSS vulnerabilities

Releases

• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• nss - Network Security Service library

Details

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

It was discovered that NSS incorrectly handled certain v2-compatible
ClientHello messages. A remote attacker could possibly use this issue to
perform a replay attack. (CVE-2018-12384)

It was discovered that NSS incorrectly handled certain padding oracles. A
remote attacker could possibly use this issue to perform a variant of the
Bleichenbacher attack. (CVE-2018-12404)

Update instructions

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

Ubuntu 18.10

• libnss3 - 2:3.36.1-1ubuntu1.1

Ubuntu 18.04

• libnss3 - 2:3.35-2ubuntu2.1

Ubuntu 16.04

• libnss3 - 2:3.28.4-0ubuntu0.16.04.4

Ubuntu 14.04

• libnss3 - 2:3.28.4-0ubuntu0.14.04.4

After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.

References

• CVE-2018-0495
• CVE-2018-12384
• CVE-2018-12404

Related notices

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