Red Hat Gluster Storage 3.5 on Red Hat Enterprise Linux 8 update for samba
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-1472 CVE-2020-14318 CVE-2020-14323 |
| CWE-ID | CWE-264 CWE-476 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software |
samba (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU45628
Risk: High
CVSSv4.0: 9.3 [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/E:A/U:Amber]
CVE-ID: CVE-2020-1472
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions in Netlogon. A remote non-authenticated attacker can use MS-NRPC to connect to a domain controller to obtain domain administrator access. This vulnerability was dubbed ZeroLogon.
MitigationInstall updates from vendor's website.
samba (Red Hat package): 4.11.6-105.el8rhgs - 4.11.6-107.el8rhgs
CPE2.3- cpe:2.3:o:red_hat:samba_redhat_package:4.11.6-105.el8rhgs:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:samba_redhat_package:4.11.6-107.el8rhgs:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHBA-2021:1503
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?
Yes. This vulnerability is being exploited in the wild.
2) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU47990
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2020-14318
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to the way "ChangeNotify" concept for SMB1/2/3 protocols was implemented in Samba. A missing permissions check on a directory handle requesting ChangeNotify means that a client with a directory handle open only for FILE_READ_ATTRIBUTES (minimal access rights) could be used to obtain change notify replies from the server. These replies contain information that should not be available to directory handles open for FILE_READ_ATTRIBUTE only. A local unprivileged user can abuse this lack of permissions check to obtain information about file changes.
Install updates from vendor's website.
samba (Red Hat package): 4.11.6-105.el8rhgs - 4.11.6-107.el8rhgs
CPE2.3- cpe:2.3:o:red_hat:samba_redhat_package:4.11.6-105.el8rhgs:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:samba_redhat_package:4.11.6-107.el8rhgs:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHBA-2021:1503
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.
3) NULL pointer dereference
EUVDB-ID: #VU47991
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-2020-14323
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when processing requests in winbind in Samba. A remote user can send specially crafted request to winbind daemon, trigger a NULL pointer dereference error and crash it.
Install updates from vendor's website.
samba (Red Hat package): 4.11.6-105.el8rhgs - 4.11.6-107.el8rhgs
CPE2.3- cpe:2.3:o:red_hat:samba_redhat_package:4.11.6-105.el8rhgs:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:samba_redhat_package:4.11.6-107.el8rhgs:*:*:*:*:red_hat_enterprise_linux:*:*
https://access.redhat.com/errata/RHBA-2021:1503
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.
