USN-3850-2: NSS vulnerabilities

Releases

• Ubuntu 12.04

Packages

• nss - Network Security Service library

Details

USN-3850-1 fixed several vulnerabilities in NSS. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory 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 12.04

• libnss3 - 2:3.28.4-0ubuntu0.12.04.2

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