CVE-2022-20648
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability in a debug function for Cisco RCM for Cisco StarOS Software could allow an unauthenticated, remote attacker to perform debug actions that could result in the disclosure of confidential information that should be restricted. This vulnerability exists because of a debug service that incorrectly listens to and accepts incoming connections. An attacker could exploit this vulnerability by connecting to the debug port and executing debug commands. A successful exploit could allow the attacker to view sensitive debugging information.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA debug service in Cisco RCM for Cisco StarOS Software incorrectly listens on and accepts incoming connections from unauthenticated remote attackers. By connecting to the exposed debug port, an attacker can execute debug commands to view sensitive debugging information that should be restricted.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Cisco RCM for StarOS installationCheck if Cisco RCM (Redundancy Configuration Manager) or StarOS software is installed on the system by reviewing installed software packages, running processes, or consulting system inventory. Look for processes or services related to 'rcm', 'staros', or Cisco carrier-grade routing software.Affected if Cisco RCM for StarOS software is present on the system
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Determine the installed versionQuery the installed version of Cisco RCM or StarOS software using the system's package manager, version command, or Cisco-specific show commands (such as 'show version' or 'show software' if accessible). Compare this version against the affected version ranges listed in Cisco's advisory for CVE-2022-20648.Affected if The installed version falls within the affected version range and the debug service is exposed
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Identify listening debug services and portsUse netstat, ss, or similar network diagnostic tools to list all listening ports on the system. Look for any debug service ports that may be exposed, particularly those associated with RCM or StarOS debug functionality. Common debug ports may include high-numbered TCP ports or known debug service endpoints.Affected if A debug service port associated with Cisco RCM or StarOS is found listening on a network interface
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Verify debug port accessibilityAttempt to connect to the identified debug port from an external host or verify through firewall rules and access control lists whether the debug service is reachable from unauthenticated remote sources. Check if the debug service binds to 0.0.0.0 or an external interface rather than localhost only.Affected if The debug port is accessible from unauthenticated remote attackers (not restricted to localhost or authenticated management networks)
The system is affected if Cisco RCM for StarOS is installed with an affected version AND the debug service is listening and accessible from unauthenticated remote sources.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the Cisco software updates that address this vulnerability; there are no available workarounds.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-20648 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-20648 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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