[USN-5506-1] NSS vulnerabilities

========================================================================== Ubuntu Security Notice USN-5506-1 July 07, 2022
nss vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 22.04 LTS – Ubuntu 21.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Several security issues were fixed in NSS.
Software Description: – nss: Network Security Service library
Tavis Ormandy discovered that NSS incorrectly handled an empty pkcs7 sequence. A remote attacker could possibly use this issue to cause NSS to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 21.10. (CVE-2022-22747)
Ronald Crane discovered that NSS incorrectly handled certain memory operations. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2022-34480)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04 LTS: libnss3 2:3.68.2-0ubuntu1.1
Ubuntu 21.10: libnss3 2:3.68-1ubuntu1.2
Ubuntu 20.04 LTS: libnss3 2:3.49.1-1ubuntu1.8
Ubuntu 18.04 LTS: libnss3 2:3.35-2ubuntu2.15
After a standard system update you need to restart any applications that use NSS to make all the necessary changes.
References: ubuntu.com/security/notices/USN-5506-1 CVE-2022-22747, CVE-2022-34480
Package Information: launchpad.net/ubuntu/+source/nss/2:3.68.2-0ubuntu1.1 launchpad.net/ubuntu/+source/nss/2:3.68-1ubuntu1.2 launchpad.net/ubuntu/+source/nss/2:3.49.1-1ubuntu1.8 launchpad.net/ubuntu/+source/nss/2:3.35-2ubuntu2.15