Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : NSS vulnerabilities (USN-4060-1)

medium Nessus Plugin ID 126772
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Ubuntu host is missing a security-related patch.


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.

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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected libnss3 package.

See Also


Plugin Details

Severity: Medium

ID: 126772

File Name: ubuntu_USN-4060-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/17/2019

Updated: 9/17/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-11727


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libnss3, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/16/2019

Vulnerability Publication Date: 7/23/2019

Reference Information

CVE: CVE-2019-11719, CVE-2019-11727, CVE-2019-11729

USN: 4060-1