CVE-2021-1446— Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
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I. Basic Information for CVE-2021-1446
Vulnerability Information
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Vulnerability Title
Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the DNS application layer gateway (ALG) functionality used by Network Address Translation (NAT) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a logic error that occurs when an affected device inspects certain DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through an affected device that is performing NAT for DNS packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device. The vulnerability can be exploited only by traffic that is sent through an affected device via IPv4 packets. The vulnerability cannot be exploited via IPv6 traffic.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对因果或异常条件的不恰当检查
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco IOS XE Software 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XE Software是美国思科（Cisco）公司的一个操作系统。用于企业有线和无线访问，汇聚，核心和WAN的单一操作系统，Cisco IOS XE降低了业务和网络的复杂性。 Cisco IOS XE Software 存在安全漏洞，该漏洞源于受影响的设备在检查某些DNS数据包时发生逻辑错误。攻击者可利用该漏洞可能会导致受影响的设备重新加载。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco IOS XE Software | n/a | - |
II. Public POCs for CVE-2021-1446
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|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-alg-dos-hbBS7SZEvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-1446
Same Patch Batch · Cisco · 2021-03-24 · 45 CVEs total
| CVE-2021-1418 | 9.9 CRITICAL | Cisco Jabber Desktop and Mobile Client Software Vulnerabilities |
| CVE-2021-1417 | 9.9 CRITICAL | Cisco Jabber Desktop and Mobile Client Software Vulnerabilities |
| CVE-2021-1411 | 9.9 CRITICAL | Cisco Jabber Desktop and Mobile Client Software Vulnerabilities |
| CVE-2021-1471 | 9.9 CRITICAL | Cisco Jabber Desktop and Mobile Client Software Vulnerabilities |
| CVE-2021-1469 | 9.9 CRITICAL | Cisco Jabber Desktop and Mobile Client Software Vulnerabilities |
| CVE-2021-1373 | 8.6 HIGH | Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Se |
| CVE-2021-1451 | 8.1 HIGH | Cisco IOS XE Software Easy Virtual Switching System Arbitrary Code Execution Vulnerability |
| CVE-2021-1433 | 8.1 HIGH | Cisco IOS XE SD-WAN Software vDaemon Buffer Overflow Vulnerability |
| CVE-2021-1392 | 7.8 HIGH | Cisco IOS and IOS XE Software Common Industrial Protocol Privilege Escalation Vulnerabili |
| CVE-2021-1437 | 7.5 HIGH | Cisco Aironet Access Points FlexConnect Upgrade Information Disclosure Vulnerability |
| CVE-2021-1431 | 7.5 HIGH | Cisco IOS XE SD-WAN Software vDaemon Denial of Service Vulnerability |
| CVE-2021-1439 | 7.4 HIGH | Cisco Aironet Access Points FlexConnect Multicast DNS Denial of Service Vulnerability |
| CVE-2021-1352 | 7.4 HIGH | Cisco IOS XE Software DECnet Phase IV/OSI Denial of Service Vulnerability |
| CVE-2021-1403 | 7.4 HIGH | Cisco IOS XE Software Web UI Cross-Site WebSocket Hijacking Vulnerability |
| CVE-2021-1432 | 7.3 HIGH | Cisco IOS XE SD-WAN Software Arbitrary Command Execution Vulnerability |
| CVE-2021-1398 | 6.8 MEDIUM | Cisco IOS XE Software Arbitrary Code Execution Vulnerability |
| CVE-2021-1452 | 6.8 MEDIUM | Cisco IOS XE ROM Monitor Software for Cisco Industrial Switches OS Command Injection Vulne |
| CVE-2021-1453 | 6.8 MEDIUM | Cisco IOS XE Software for the Catalyst 9000 Family Arbitrary Code Execution Vulnerability |
| CVE-2021-1441 | 6.7 MEDIUM | Cisco IOS XE Software Hardware Initialization Routines Arbitrary Code Execution Vulnerabil |
| CVE-2021-1449 | 6.7 MEDIUM | Cisco Access Point Software Arbitrary Code Execution Vulnerability |
Showing top 20 of 45 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-1446
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