SUSE update for krb5

Published: 2022-11-21

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-37750 CVE-2022-42898
CWE-ID	CWE-476 CWE-190
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Server for SAP Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing Operating systems & Components / Operating system SUSE Linux Enterprise Server Operating systems & Components / Operating system krb5-32bit-debuginfo Operating systems & Components / Operating system package or component krb5-32bit Operating systems & Components / Operating system package or component krb5-server-debuginfo Operating systems & Components / Operating system package or component krb5-server Operating systems & Components / Operating system package or component krb5-plugin-preauth-pkinit-debuginfo Operating systems & Components / Operating system package or component krb5-plugin-preauth-pkinit Operating systems & Components / Operating system package or component krb5-plugin-preauth-otp-debuginfo Operating systems & Components / Operating system package or component krb5-plugin-preauth-otp Operating systems & Components / Operating system package or component krb5-plugin-kdb-ldap-debuginfo Operating systems & Components / Operating system package or component krb5-plugin-kdb-ldap Operating systems & Components / Operating system package or component krb5-devel Operating systems & Components / Operating system package or component krb5-debugsource Operating systems & Components / Operating system package or component krb5-debuginfo Operating systems & Components / Operating system package or component krb5-client-debuginfo Operating systems & Components / Operating system package or component krb5-client Operating systems & Components / Operating system package or component krb5 Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU56828

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-37750

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the Key Distribution Center (KDC) in kdc/do_tgs_req.c. A remote user can pass specially crafted data via the FAST inner body that lacks a server field, trigger a NULL pointer dereference error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package krb5 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP: 15-SP2

SUSE Linux Enterprise High Performance Computing: 15-ESPOS - 15-LTSS

SUSE Linux Enterprise Server: 15-LTSS

krb5-32bit-debuginfo: before 1.15.2-150000.6.17.1

krb5-32bit: before 1.15.2-150000.6.17.1

krb5-server-debuginfo: before 1.15.2-150000.6.17.1

krb5-server: before 1.15.2-150000.6.17.1

krb5-plugin-preauth-pkinit-debuginfo: before 1.15.2-150000.6.17.1

krb5-plugin-preauth-pkinit: before 1.15.2-150000.6.17.1

krb5-plugin-preauth-otp-debuginfo: before 1.15.2-150000.6.17.1

krb5-plugin-preauth-otp: before 1.15.2-150000.6.17.1

krb5-plugin-kdb-ldap-debuginfo: before 1.15.2-150000.6.17.1

krb5-plugin-kdb-ldap: before 1.15.2-150000.6.17.1

krb5-devel: before 1.15.2-150000.6.17.1

krb5-debugsource: before 1.15.2-150000.6.17.1

krb5-debuginfo: before 1.15.2-150000.6.17.1

krb5-client-debuginfo: before 1.15.2-150000.6.17.1

krb5-client: before 1.15.2-150000.6.17.1

krb5: before 1.15.2-150000.6.17.1

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20224154-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Integer overflow

EUVDB-ID: #VU69337