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

Medium Nessus Plugin ID 126772

Synopsis

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

Description

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).

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.

Solution

Update the affected libnss3 package.

See Also

https://usn.ubuntu.com/4060-1/

Plugin Details

Severity: Medium

ID: 126772

File Name: ubuntu_USN-4060-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2019/07/17

Updated: 2020/01/08

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2019-11727

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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: CVSS:3.0/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: 2019/07/16

Vulnerability Publication Date: 2019/07/23

Reference Information

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

USN: 4060-1