Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS : Heimdal vulnerabilities (USN-5675-1)

high Nessus Plugin ID 166109


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


The remote Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5675-1 advisory.

- A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal. (CVE-2018-16860)

- In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.

- A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.

- The Heimdal Software Kerberos 5 implementation is vulnerable to a null pointer dereferance. An attacker with network access to an application that depends on the vulnerable code path can cause the application to crash. (CVE-2022-3116)

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


Update the affected packages.

See Also


Plugin Details

Severity: High

ID: 166109

File Name: ubuntu_USN-5675-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 10/14/2022

Updated: 4/11/2023

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

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2018-16860


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:heimdal-clients, p-cpe:/a:canonical:ubuntu_linux:heimdal-clients-x, p-cpe:/a:canonical:ubuntu_linux:heimdal-dev, p-cpe:/a:canonical:ubuntu_linux:heimdal-kcm, p-cpe:/a:canonical:ubuntu_linux:heimdal-kdc, p-cpe:/a:canonical:ubuntu_linux:heimdal-multidev, p-cpe:/a:canonical:ubuntu_linux:heimdal-servers, p-cpe:/a:canonical:ubuntu_linux:heimdal-servers-x, p-cpe:/a:canonical:ubuntu_linux:libasn1-8-heimdal, p-cpe:/a:canonical:ubuntu_linux:libgssapi3-heimdal, p-cpe:/a:canonical:ubuntu_linux:libhcrypto4-heimdal, p-cpe:/a:canonical:ubuntu_linux:libhdb9-heimdal, p-cpe:/a:canonical:ubuntu_linux:libheimbase1-heimdal, p-cpe:/a:canonical:ubuntu_linux:libheimntlm0-heimdal, p-cpe:/a:canonical:ubuntu_linux:libhx509-5-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkadm5clnt7-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkadm5srv8-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkafs0-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkdc2-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkrb5-26-heimdal, p-cpe:/a:canonical:ubuntu_linux:libotp0-heimdal, p-cpe:/a:canonical:ubuntu_linux:libroken18-heimdal, p-cpe:/a:canonical:ubuntu_linux:libsl0-heimdal, p-cpe:/a:canonical:ubuntu_linux:libwind0-heimdal

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/13/2022

Vulnerability Publication Date: 5/14/2019

Reference Information

CVE: CVE-2018-16860, CVE-2019-12098, CVE-2021-3671, CVE-2022-3116

USN: 5675-1