Vulnerability Name:

CVE-2020-9307 (CCN-196937)

Assigned:2020-02-19
Published:2021-02-11
Updated:2021-02-23
Summary:Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00 allow a denial of service. An unauthenticated, adjacent attacker can cause an infinite loop on one of the HSR ring ports of the device. This effectively breaks the redundancy of the HSR ring. If the attacker can perform the same attack on a second device, the ring is broken into two parts (thus disrupting communication between devices in the different parts).
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:U)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:U)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:6.1 Medium (CVSS v2 Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
6.1 Medium (CCN CVSS v2 Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-835
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-9307

Source: XF
Type: UNKNOWN
hirschmann-cve20209307-dos(196937)

Source: CCN
Type: Hirschmann Web site
Hirschmann

Source: CCN
Type: BSECV-2019-08
Hirschmann RSP, RSPE, and OS2 series HSR denial of service vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view

Source: MISC
Type: Vendor Advisory
https://www.belden.com/security

Vulnerable Configuration:Configuration 1:
  • cpe:/o:belden:hirschmann_hios:*:*:*:*:*:*:*:* (Version >= 07.0.04 and < 07.1.00)
  • OR cpe:/o:belden:hirschmann_hios:*:*:*:*:*:*:*:* (Version >= 08.0.00 and < 08.3.00)

    • * Denotes that component is vulnerable
    BACK
    belden hirschmann hios *
    belden hirschmann hios *