SUSE update for krb5



Published: 2021-12-06
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-37750
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		SUSE MicroOS
Operating systems & Components / Operating system

krb5-debugsource
Operating systems & Components / Operating system package or component

krb5-debuginfo
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 one medium risk vulnerability.

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 MicroOS: 5.1

krb5-debugsource: before 1.16.3-3.24.1

krb5-debuginfo: before 1.16.3-3.24.1

krb5: before 1.16.3-3.24.1

CPE2.3 External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213454-2/


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.



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