Ubuntu Security Update USN-8071-2: NSS vulnerability

[LinuxBot]

USN-8071-1 fixed a vulnerability in nss. This update provides the corresponding fix for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: It was discovered that NSS incorrectly handled memory when performing certain GHASH operations. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.

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