A vulnerability in the SSH service of Cisco Catalyst SD-WAN Manager could allow an…
CVE-2023-20262 is a high-severity vulnerability in Cisco SD-WAN Solution from Cisco, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Cisco SD-WAN Solution versions: 17.2.4; 17.2.5; 17.2.6, 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 1% chance of exploitation within 30 days, higher than 63% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Catalyst Sd-wan Manager to 20.9.3 or a later version.
- Update Sd-wan Vmanage to 20.3.7 or 20.11.1, whichever matches your release line, or a later version.
- Read the advisory on sec.cloudapps.cisco.com for workarounds and exact fixed builds.
- 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 SD-WAN Solution | 17.2.4; 17.2.5; 17.2.6; 17.2.7; 17.2.8; 17.2.9; 17.2.10; 18.2.0; and 32 more ranges | Not stated |
| Cisco | Cisco SD-WAN vManage | 17.2.6; 17.2.7; 17.2.8; 17.2.9; 17.2.10; 17.2.4; 17.2.5; 18.3.1.1; and 32 more ranges | Not stated |
| Cisco | Cisco SD-WAN vSmart | Not specified in the record | Not stated |
| Cisco | Catalyst Sd-wan Manager | 20.4 up to, but not including, 20.9.3 | 20.9.3 |
| Cisco | Sd-wan Vmanage | before 20.3.7; 20.10 up to, but not including, 20.11.1; 20.12 | 20.3.7, 20.11.1 |
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
- LowNo special conditions are needed; the attack works reliably.
- 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
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.3 | Medium | CNA (cisco.com) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
A vulnerability in the SSH service of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to cause a process crash, resulting in a DoS condition for SSH access only. This vulnerability does not prevent the system from continuing to function, and web UI access is not affected. This vulnerability is due to insufficient resource management when an affected system is in an error condition. An attacker could exploit this vulnerability by sending malicious traffic to the affected system. A successful exploit could allow the attacker to cause the SSH process to crash and restart, resulting in a DoS condition for the SSH service.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Advisories
Other vulnerabilities in Cisco SD-WAN Solution
- 7.1 High severity
- 7.8 High severity
- 7.8 High severity
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