Anolis OS update for krb5



| Updated: 2025-03-28
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-36222
CVE-2021-37750
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Anolis OS
Operating systems & Components / Operating system

libkadm5
Operating systems & Components / Operating system package or component

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

krb5-server-ldap
Operating systems & Components / Operating system package or component

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

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

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

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

Vendor OpenAnolis

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU55287

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36222

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5). A remote attacker can send a request containing a PA-ENCRYPTED-CHALLENGE padata element without using FAST and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

libkadm5: before 1.18.2-8.3

krb5-workstation: before 1.18.2-8.3

krb5-server-ldap: before 1.18.2-8.3

krb5-server: before 1.18.2-8.3

krb5-pkinit: before 1.18.2-8.3

krb5-libs: before 1.18.2-8.3

krb5-devel: before 1.18.2-8.3

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2021:0077


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) NULL pointer dereference

EUVDB-ID: #VU56828

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

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

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

libkadm5: before 1.18.2-8.3

krb5-workstation: before 1.18.2-8.3

krb5-server-ldap: before 1.18.2-8.3

krb5-server: before 1.18.2-8.3

krb5-pkinit: before 1.18.2-8.3

krb5-libs: before 1.18.2-8.3

krb5-devel: before 1.18.2-8.3

CPE2.3 External links

https://anas.openanolis.cn/errata/detail/ANSA-2021:0077


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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