Ubuntu 16.04 LTS / 18.04 LTS / 18.10 / 19.04 : gnutls28 vulnerabilities (USN-3999-1)

Medium Nessus Plugin ID 125622

Synopsis

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

Description

Eyal Ronen, Kenneth G. Paterson, and Adi Shamir discovered that GnuTLS was vulnerable to a timing side-channel attack known as the 'Lucky Thirteen' issue. A remote attacker could possibly use this issue to perform plaintext-recovery attacks via analysis of timing data. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
(CVE-2018-10844, CVE-2018-10845, CVE-2018-10846)

Tavis Ormandy discovered that GnuTLS incorrectly handled memory when verifying certain X.509 certificates. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 18.10, and Ubuntu 19.04. (CVE-2019-3829)

It was discovered that GnuTLS incorrectly handled certain post-handshake messages. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10 and Ubuntu 19.04. (CVE-2019-3836).

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 libgnutls30 package.

See Also

https://usn.ubuntu.com/3999-1/

Plugin Details

Severity: Medium

ID: 125622

File Name: ubuntu_USN-3999-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2019/05/31

Updated: 2020/01/13

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2018-10845

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

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

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

CVSS v3.0

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libgnutls30, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.10, 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: 2019/05/30

Vulnerability Publication Date: 2018/08/22

Reference Information

CVE: CVE-2018-10844, CVE-2018-10845, CVE-2018-10846, CVE-2019-3829, CVE-2019-3836

USN: 3999-1