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Amazon Linux 2023 : krb5-devel, krb5-libs, krb5-pkinit (ALAS2023-2023-321)

critical Nessus Plugin ID 181152

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-321 advisory.

 lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because
 _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_data and the key_data array count. (CVE-2023-36054)

 kdc/do_tgs_req.c in MIT Kerberos 5 (aka krb5) 1.21 before 1.21.2 has a double free that is reachable if an authenticated user can trigger an authorization-data handling failure. Incorrect data is copied from one ticket to another. (CVE-2023-39975)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'dnf update krb5 --releasever 2023.1.20230906' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2023-321.html

https://alas.aws.amazon.com/cve/html/CVE-2023-36054.html

https://alas.aws.amazon.com/cve/html/CVE-2023-39975.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Critical

ID: 181152

File Name: al2023_ALAS2023-2023-321.nasl

Version: 1.1

Type: local

Agent: unix

Published: 9/8/2023

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

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-2023-39975

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:krb5-pkinit-debuginfo, p-cpe:/a:amazon:linux:libkadm5-debuginfo, p-cpe:/a:amazon:linux:krb5-pkinit, p-cpe:/a:amazon:linux:krb5-debugsource, p-cpe:/a:amazon:linux:krb5-devel, p-cpe:/a:amazon:linux:krb5-debuginfo, p-cpe:/a:amazon:linux:libkadm5, p-cpe:/a:amazon:linux:krb5-workstation, p-cpe:/a:amazon:linux:krb5-server-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:krb5-libs, p-cpe:/a:amazon:linux:krb5-server, p-cpe:/a:amazon:linux:krb5-server-ldap, p-cpe:/a:amazon:linux:krb5-workstation-debuginfo, p-cpe:/a:amazon:linux:krb5-server-ldap-debuginfo, p-cpe:/a:amazon:linux:krb5-libs-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2023

Vulnerability Publication Date: 7/11/2023

Reference Information

CVE: CVE-2023-36054, CVE-2023-39975