Cisco Redundancy Configuration Manager: Active Debug Code
CVE-2022-20649 is a high-severity active debug code vulnerability in Cisco Redundancy Configuration Manager from Cisco, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Cisco Redundancy Configuration Manager versions: 2021.02.0; 2021.01.0; 21.19.n13, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 12% chance of exploitation within 30 days, which is in the top 3.82% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update redundancy_configuration_manager to 21.25.4 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Cisco | Cisco Redundancy Configuration Manager | 2021.02.0; 2021.01.0; 21.19.n13; 21.17.19; 21.18.24; 21.25.0; 21.15.60; 21.22.11; and 32 more ranges | Not stated |
| Cisco | redundancy_configuration_manager | before 21.25.4 | 21.25.4 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (cisco.com).
Official description
A vulnerability in Cisco RCM for Cisco StarOS Software could allow an unauthenticated, remote attacker to perform remote code execution on the application with root-level privileges in the context of the configured container. This vulnerability exists because the debug mode is incorrectly enabled for specific services. An attacker could exploit this vulnerability by connecting to the device and navigating to the service with debug mode enabled. A successful exploit could allow the attacker to execute arbitrary commands as the root user. The attacker would need to perform detailed reconnaissance to allow for unauthenticated access. The vulnerability can also be exploited by an authenticated attacker. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Active Debug Code
The product is released with debugging code still enabled or active.
How developers prevent this class of flaw
- Remove debug code before deploying the application.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in Cisco Redundancy Configuration Manager
- 7.5 High severity
Recent Active Debug Code vulnerabilities
- 7.8 High severity
- 7.2 High severity
- 7.5 High severity
- 7.2 High severity
- 9.8 Critical severity
- 9.8 Critical severity
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