Detections
Analytics

RHEL 7 : krb5 (Unpatched Vulnerability)

critical Nessus Plugin ID 199136

Synopsis

The remote Red Hat 7 host is affected by multiple vulnerabilities that will not be patched.

Description

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

 - krb5: Buffer overflow in get_matching_data() (CVE-2017-15088)

 - Kerberos: delegation constrain bypass in S4U2Proxy (CVE-2020-17049)

 - The kadm5_randkey_principal_3 function in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13 sends old keys in a response to a -randkey -keepold request, which allows remote authenticated users to forge tickets by leveraging administrative access. (CVE-2014-5351)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

Solution

The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation guidance.

See Also

http://www.nessus.org/u?ebcca955

Plugin Details

Severity: Critical

ID: 199136

File Name: redhat_unpatched_krb5-rhel7.nasl

Version: 1.2

Type: local

Agent: unix

Published: 6/3/2024

Updated: 10/8/2024

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2020-17049

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS Score Source: CVE-2017-15088

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:krb5, cpe:/o:redhat:enterprise_linux:7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/22/2014

Reference Information

CVE: CVE-2014-5351, CVE-2015-2695, CVE-2015-2696, CVE-2015-2697, CVE-2017-11462, CVE-2017-15088, CVE-2020-17049