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Ubuntu 4060-1 Advisory: NSS Denial of Service and Info Leak Issues

Several security issues were fixed in NSS.. =========================================================================Ubuntu Security Notice USN-4060-1 July 16, 2019 nss vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in NSS. Software Description: - nss: Network Security Service library Details: Henry Corrigan-Gibbs discovered that NSS incorrectly handled importing certain curve25519 private keys. An attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly obtain sensitive information. (CVE-2019-11719) Hubert Kario discovered that NSS incorrectly handled PKCS#1 v1.5 signatures when using TLSv1.3. An attacker could possibly use this issue to trick NSS into using PKCS#1 v1.5 signatures, contrary to expectations. This issue only applied to Ubuntu 19.04. (CVE-2019-11727) Jonas Allmann discovered that NSS incorrectly handled certain p256-ECDH public keys. An attacker could possibly use this issue to cause NSS to crash, resulting in a denial of service. (CVE-2019-11729) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: libnss3 2:3.42-1ubuntu2.1 Ubuntu 18.04 LTS: libnss3 2:3.35-2ubuntu2.3 Ubuntu 16.04 LTS: libnss3 2:3.28.4-0ubuntu0.16.04.6 After a standard system update you need to restart any applications that use NSS, such as Evolution, to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4060-1 CVE-2019-11719, CVE-2019-11727, CVE-2019-11729 Package Information: https://launchpad.net/ubuntu/+source/nss/2:3.42-1ubuntu2.1 https://launchpad.net/ubuntu/+source/nss/2:3.35-2ubuntu2.3 https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.6 . Multiple vulnerabilities addressed in NSS for Ubuntu; mandatory upgrade necessary to prevent service interruptions and safeguard sensitive information.. NSS Vulnerabilities, Ubuntu Security Update, Denial of Service, NSS Crash Issue, Sensitive Information Leak. . Severity: Critical. LinuxSecurity.com Team

Jul 16, 2019 •Critical Ubuntu