Synology-SA-20:18 DSM

Abstract

Multiple vulnerabilities allow remote attackers to conduct man-in-the-middle attacks via a susceptible version of Synology DiskStation Manager (DSM).

Affected Products

Mitigation

None

Detail

• CVE-2020-27648

  • Severity: Moderate
  • CVSS3 Base Score: 8.3
  • CVSS3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
  • Improper certificate validation vulnerability in OpenVPN client in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

• CVE-2020-27650

  • Severity: Moderate
  • CVSS3 Base Score: 5.8
  • CVSS3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
  • Synology DiskStation Manager (DSM) before 6.2.3-25426-2 does not set the Secure flag for the session cookie in an HTTPS session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an HTTP session.

• CVE-2020-27652

  • Severity: Moderate
  • CVSS3 Base Score: 8.3
  • CVSS3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
  • Algorithm downgrade vulnerability in QuickConnect in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.

• CVE-2020-27656

  • Severity: Moderate
  • CVSS3 Base Score: 6.5
  • CVSS3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
  • Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.

Revision