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Ubuntu 14.04 LTS : NSS vulnerabilities (USN-2672-1)

high Nessus Plugin ID 84666

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2672-1 advisory.

 Karthikeyan Bhargavan discovered that NSS incorrectly handled state transitions for the TLS state machine.
 If a remote attacker were able to perform a machine-in-the-middle attack, this flaw could be exploited to skip the ServerKeyExchange message and remove the forward-secrecy property. (CVE-2015-2721)

 Watson Ladd discovered that NSS incorrectly handled Elliptical Curve Cryptography (ECC) multiplication. A remote attacker could possibly use this issue to spoof ECDSA signatures. (CVE-2015-2730)

 As a security improvement, this update modifies NSS behaviour to reject DH key sizes below 768 bits, preventing a possible downgrade attack.

 This update also refreshes the NSS package to version 3.19.2 which includes the latest CA certificate bundle.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-2672-1

Plugin Details

Severity: High

ID: 84666

File Name: ubuntu_USN-2672-1.nasl

Version: 1.13

Type: local

Agent: unix

Published: 7/13/2015

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2015-2730

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libnss3, p-cpe:/a:canonical:ubuntu_linux:libnss3-1d, p-cpe:/a:canonical:ubuntu_linux:libnss3-nssdb, p-cpe:/a:canonical:ubuntu_linux:libnss3-dev, p-cpe:/a:canonical:ubuntu_linux:libnss3-tools

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/9/2015

Vulnerability Publication Date: 7/5/2015

Reference Information

CVE: CVE-2015-2721, CVE-2015-2730

BID: 75541

USN: 2672-1