Alibaba Cloud Linux 3 : 0068: krb5 (ALINUX3-SA-2021:0068)

high Nessus Plugin ID 236745

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2021:0068 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2021-36222:
ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

CVE-2021-37750:
The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux 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.

Plugin Details

Severity: High

ID: 236745

File Name: alinux3_sa_2021-0068.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 5/14/2025

Updated: 5/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-36222

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-workstation-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-devel-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libkadm5, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-debugsource, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-pkinit, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:libkadm5-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-server-ldap-debuginfo, cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-server-ldap, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-workstation, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-server-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-libs-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-libs, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-pkinit-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-server, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:krb5-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/26/2021

Vulnerability Publication Date: 7/22/2021

Reference Information

CVE: CVE-2021-36222, CVE-2021-37750

Detections

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