USN-5168-3 fixed a vulnerability in NSS. Unfortunately that update introduced a regression that could break SSL connections. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Tavis Ormandy discovered that NSS incorrectly handled verifying DSA/RSA-PSS signatures. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "binaries": [ { "libnss3-nssdb": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3-1d": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3-dbgsym": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3-dev": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3-dbg": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3-tools": "2:3.28.4-0ubuntu0.14.04.5+esm10", "libnss3-tools-dbgsym": "2:3.28.4-0ubuntu0.14.04.5+esm10" } ] }
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "binaries": [ { "libnss3-nssdb": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3-1d": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3-dbgsym": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3-dev": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3-dbg": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3-tools": "2:3.28.4-0ubuntu0.16.04.14+esm2", "libnss3-tools-dbgsym": "2:3.28.4-0ubuntu0.16.04.14+esm2" } ] }