CVE-2017-12231KEVin critical feed
A vulnerability in the implementation of Network Address Translation (NAT) functionality in Cisco IOS 12.4 through 15.6 could allow an unau…
Published 9 y ago · modified 4 mo ago · JSON
Summary
A vulnerability in the implementation of Network Address Translation (NAT) functionality in Cisco IOS 12.4 through 15.6 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to the improper translation of H.323 messages that use the Registration, Admission, and Status (RAS) protocol and are sent to an affected device via IPv4 packets. An attacker could exploit this vulnerability by sending a crafted H.323 RAS packet through an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition. This vulnerability affects Cisco devices that are configured to use an application layer gateway with NAT (NAT ALG) for H.323 RAS messages. By default, a NAT ALG is enabled for H.323 RAS messages. Cisco Bug IDs: CSCvc57217.
Known exploited (CISA KEV)
- Added
- 4 y ago
- Due date
- 2022-03-24 (4 y ago)
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Vendor / product
- Cisco / IOS software
- CISA name
- Cisco IOS Software Network Address Translation Denial-of-Service Vulnerability
CISA SSVC assessment
- Exploitation
- Active — exploited in the wild
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 23 mo ago
Exploit prediction (EPSS)
7.07% probability of exploitation in the next 30 days, higher than 94% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Affected products
- n/a Cisco IOS
Classification
- Weakness
- CWE-399 Resource Management Errors
- Technology feeds
- Cisco IOS (RSS, critical only)
References
- securitytracker.com /id/1039449 · vdb-entry, x_refsource_SECTRACK, x_transferred
- tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-nat · x_refsource_CONFIRM, x_transferred
- securityfocus.com /bid/101039 · vdb-entry, x_refsource_BID, x_transferred
- cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12231 · government-resource
Sources
- CVE List: CVE-2017-12231
- NVD: CVE-2017-12231
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