CVE-2023-20109
Confirmed PUBLISHEDA vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature of Cisco IOS Software and Cisco IOS XE Software could allow an...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Sep 27, 2023
- Exploitation Reported
- Oct 10, 2023
- CVSS
- 6.6 Medium
- EPSS
- —
Affected Versions
1,038 version rows · page 10 of 42
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
IOS
|
12.4(24)MDB1 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB3 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB4 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB5 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB6 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB7 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB5a |
Affected |
| Cisco |
IOS
|
12.4(24)MDB8 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB9 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB10 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB11 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB12 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB13 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB14 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB15 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB16 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB17 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB18 |
Affected |
| Cisco |
IOS
|
12.4(24)MDB19 |
Affected |
| Cisco |
IOS
|
15.0(2)EX |
Affected |
| Cisco |
IOS
|
15.0(2)EX1 |
Affected |
| Cisco |
IOS
|
15.0(2)EX2 |
Affected |
| Cisco |
IOS
|
15.0(2)EX3 |
Affected |
| Cisco |
IOS
|
15.0(2)EX4 |
Affected |
| Cisco |
IOS
|
15.0(2)EX5 |
Affected |
CVE References
- cisco-sa-getvpn-rce-g8qR68sx sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2023-10-10 00:00 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2023-10-10 00:00:00 UTC · CISA
Weaknesses (CWE)
-
Out-of-bounds Write
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/183215 | Jun 02, 2025 |
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
09:26 UTC about 1 year ago09:26 UTC · about 1 year ago
Nessus plugin available
Scanner coverage available
-
00:00 UTC almost 3 years ago00:00 UTC · almost 3 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
17:23 UTC almost 3 years ago17:23 UTC · almost 3 years ago
CVE published
Vulnerability disclosed publicly
-
18:47 UTC over 3 years ago18:47 UTC · over 3 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2023-20109
{
"cve_id": "CVE-2023-20109",
"title": "A vulnerability in the Cisco Group Encrypted Transport VPN (GET VPN) feature ...",
"affected_vendor": "Cisco",
"affected_product": "IOS, Cisco IOS XE Software",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 6.6,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}