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CVE-2023-20109

Exploited in the wild. In CISA KEV since 2023‑10‑10. A vendor fix is available.

CVSS 3.16.6MediumEPSS percentile84th2.5% chance in 30 daysCISA KEVListedsince 2023-10-10, due 2023-10-31
Public exploit: 0 sourcesFixVendor fixNo build named by the sources

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • Cisco IOSAffected: 12.4(24)TUpgrade to: not statedAffected: 12.4(24)T3Upgrade to: not statedAffected: 12.4(22)T1Upgrade to: not statedAffected: 12.4(24)T5Upgrade to: not stated + 670 more branchesStated by: CVE record
  • Cisco IOS XE SoftwareAffected: 3.7.0SUpgrade to: not statedAffected: 3.7.1SUpgrade to: not statedAffected: 3.7.2SUpgrade to: not statedAffected: 3.7.3SUpgrade to: not stated + 360 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened.

What it is

From the CVE record

A vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker who has administrative control of either a group member or a key server to execute arbitrary code on an affected device or cause the device to crash. This vulnerability is due to insufficient validation of attributes in the Group Domain of Interpretation (GDOI) and G-IKEv2 protocols of the GET VPN feature. An attacker could exploit this vulnerability by either compromising an installed key server or modifying the configuration of a group member to point to a key server that is controlled by the attacker. A successful exploit could allow the attacker to execute arbitrary code and gain full control of the affected system or cause the affected system to reload, resulting in a denial of service (DoS) condition. For more information, see the Details ["#details"] section of this advisory.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS84th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2023-10-10.

US federal agencies must remediate by 2023-10-31.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public exploits

0 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

2.5% chance of exploitation activity in the next 30 days, which ranks it in the 84th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

7 events over 1002 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Added to CISA KEV
  4. Publishedweakness classified, att&ck mapped

Affected products

And 3 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Scored 6.6 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required HighRequires admin or elevated privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 3 more references. See all after sign-in

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for IOS, not every advisory. This one: actively exploited.