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.
結論預警: CVE-2017-12231 綜合評估為嚴重在野威脅(87.9/100):CVSS 技術影響為高級,利用機率偏高(EPSS 7.13%,百分位 94%) 核心證據: CISA 已知被利用漏洞目錄(KEV)已於 2022-03-03 確認在野利用,影響 Cisco / IOS software,弱點類型(CWE-399),攻擊者可能未經認證遠端取得高權限管理存取。 強制指令: CISA 處置期限已過,應以應急修補優先立即處理。
風險隨態勢動態變化;本站持續評估並同步更新本頁展示內容。
: Cisco IOS Software Network Address Translation Denial-of-Service Vulnerability · CISA KEV 詳情
: 2022-03-03
: 2022-03-24
: Apply updates per vendor instructions.
EPSS 日更估計相對被利用可能性;百分位表示該 CVE 在已評分漏洞中的相對排名(越高表示相對更嚴重)。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化(新 − 舊) |
|---|---|---|---|---|
| 1 | 2026-07-12 | 6.94% | 7.13% | +0.19% |
| 2 | 2026-06-15 | 9.35% | 6.94% | -2.41% |
| 3 | 2026-04-22 | — | 9.35% | — |
完整 EPSS 歷史 (共 15 筆)
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| URL | 標籤 |
|---|---|
| http://www.securityfocus.com/bid/101039 | Broken Link Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1039449 | Broken Link Third Party Advisory VDB Entry |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-nat | Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12231 | US Government Resource |