Synology-SA-22:10 Samba

Publish Time: 2022-07-29 15:12:19 UTC+8

Last Updated: 2022-08-26 17:48:28 UTC+8

Severity
Important
Status
Ongoing

Abstract

CVE-2022-32742 allows remote authenticated users to obtain sensitive information via a susceptible version of Synology DiskStation Manager (DSM), Synology Router Manager (SRM) and SMB Service.

CVE-2022-2031, CVE-2022-32744, and CVE-2022-32746 allow remote authenticated users to bypass security constraint and conduct denial-of-service attacks via a susceptible version of Synology Directory Server.

None of Synology's products are affected by CVE-2022-32745 as this vulnerability only affect Samba 4.13 and later.

Affected Products

Product Severity Fixed Release Availability
DSM 6.2 Moderate Ongoing
SRM 1.3 Moderate Ongoing
SRM 1.2 Moderate Ongoing
DSMUC 3.1 Not affected N/A
VS Firmware 3.0 Not affected N/A
VS Firmware 2.3 Not affected N/A
SMB Service for DSM 7.1 Moderate Ongoing
SMB Service for DSM 7.0 Moderate Ongoing
Synology Directory Server for DSM 7.1 Important Ongoing
Synology Directory Server for DSM 7.0 Important Ongoing
Synology Directory Server for DSM 6.2 Important Ongoing

Mitigation

If you need immediate assistance, please contact Synology technical support via https://account.synology.com/support.

Detail

  • CVE-2022-32744

    • Severity: Important
    • CVSS3 Base Score: 8.8
    • CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    • A flaw was found in Samba. The KDC accepts kpasswd requests encrypted with any key known to it. By encrypting forged kpasswd requests with its own key, a user can change other users' passwords, enabling full domain takeover.

  • CVE-2022-2031

    • Severity: Moderate
    • CVSS3 Base Score: 5.4
    • CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
    • A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each other's tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.

  • CVE-2022-32742

    • Severity: Moderate
    • CVSS3 Base Score: 4.3
    • CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
    • A flaw was found in Samba. Some SMB1 write requests were not correctly range-checked to ensure the client had sent enough data to fulfill the write, allowing server memory contents to be written into the file (or printer) instead of client-supplied data. The client cannot control the area of the server memory written to the file (or printer).

  • CVE-2022-32746

    • Severity: Moderate
    • CVSS3 Base Score: 5.4
    • CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
    • A flaw was found in the Samba AD LDAP server. The AD DC database audit logging module can access LDAP message values freed by a preceding database module, resulting in a use-after-free issue. This issue is only possible when modifying certain privileged attributes, such as userAccountControl.

  • CVE-2022-32745

    • Severity: Not affected
    • CVSS3 Base Score: 0.0
    • CVSS3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N
    • A flaw was found in Samba. Samba AD users can cause the server to access uninitialized data with an LDAP add or modify the request, usually resulting in a segmentation fault.

Reference

Revision

Revision Date Description
1 2022-07-29 Initial public release.
2 2022-08-26 Disclosed vulnerability details.