Vulnerability Monitor

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CVE-2021-1446

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.

Published

2021-03-24T20:15:15.307

Last Modified

2024-11-21T05:44:22.957

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

8.6

Impact Score

6.9

Weaknesses
  • Type: Primary
    CWE-754
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xe 3.7.0bs Yes
Operating System cisco ios_xe 3.7.0s Yes
Operating System cisco ios_xe 3.7.0xas Yes
Operating System cisco ios_xe 3.7.0xbs Yes
Operating System cisco ios_xe 3.7.1as Yes
Operating System cisco ios_xe 3.7.1s Yes
Operating System cisco ios_xe 3.7.2s Yes
Operating System cisco ios_xe 3.7.2ts Yes
Operating System cisco ios_xe 3.7.3s Yes
Operating System cisco ios_xe 3.7.4as Yes
Operating System cisco ios_xe 3.7.4s Yes
Operating System cisco ios_xe 3.7.5s Yes
Operating System cisco ios_xe 3.7.6s Yes
Operating System cisco ios_xe 3.7.7s Yes
Operating System cisco ios_xe 3.7.8s Yes
Operating System cisco ios_xe 3.8.0s Yes
Operating System cisco ios_xe 3.8.1s Yes
Operating System cisco ios_xe 3.8.2s Yes
Operating System cisco ios_xe 3.9.0as Yes
Operating System cisco ios_xe 3.9.0s Yes
Operating System cisco ios_xe 3.9.0xas Yes
Operating System cisco ios_xe 3.9.1as Yes
Operating System cisco ios_xe 3.9.1s Yes
Operating System cisco ios_xe 3.9.2s Yes
Operating System cisco ios_xe 3.10.0s Yes
Operating System cisco ios_xe 3.10.1s Yes
Operating System cisco ios_xe 3.10.1xbs Yes
Operating System cisco ios_xe 3.10.1xcs Yes
Operating System cisco ios_xe 3.10.2as Yes
Operating System cisco ios_xe 3.10.2s Yes
Operating System cisco ios_xe 3.10.2ts Yes
Operating System cisco ios_xe 3.10.3s Yes
Operating System cisco ios_xe 3.10.4s Yes
Operating System cisco ios_xe 3.10.5s Yes
Operating System cisco ios_xe 3.10.6s Yes
Operating System cisco ios_xe 3.10.7s Yes
Operating System cisco ios_xe 3.10.8as Yes
Operating System cisco ios_xe 3.10.8s Yes
Operating System cisco ios_xe 3.10.9s Yes
Operating System cisco ios_xe 3.10.10s Yes
Operating System cisco ios_xe 3.11.0s Yes
Operating System cisco ios_xe 3.11.1s Yes
Operating System cisco ios_xe 3.11.2s Yes
Operating System cisco ios_xe 3.11.3s Yes
Operating System cisco ios_xe 3.11.4s Yes
Operating System cisco ios_xe 3.12.0as Yes
Operating System cisco ios_xe 3.12.0s Yes
Operating System cisco ios_xe 3.12.1s Yes
Operating System cisco ios_xe 3.12.2s Yes
Operating System cisco ios_xe 3.12.3s Yes
Operating System cisco ios_xe 3.12.4s Yes
Operating System cisco ios_xe 3.13.0as Yes
Operating System cisco ios_xe 3.13.0s Yes
Operating System cisco ios_xe 3.13.1s Yes
Operating System cisco ios_xe 3.13.2as Yes
Operating System cisco ios_xe 3.13.2s Yes
Operating System cisco ios_xe 3.13.3s Yes
Operating System cisco ios_xe 3.13.4s Yes
Operating System cisco ios_xe 3.13.5as Yes
Operating System cisco ios_xe 3.13.5s Yes
Operating System cisco ios_xe 3.13.6as Yes
Operating System cisco ios_xe 3.13.6bs Yes
Operating System cisco ios_xe 3.13.6s Yes
Operating System cisco ios_xe 3.13.7as Yes
Operating System cisco ios_xe 3.13.7s Yes
Operating System cisco ios_xe 3.13.8s Yes
Operating System cisco ios_xe 3.13.9s Yes
Operating System cisco ios_xe 3.13.10s Yes
Operating System cisco ios_xe 3.14.0s Yes
Operating System cisco ios_xe 3.14.1s Yes
Operating System cisco ios_xe 3.14.2s Yes
Operating System cisco ios_xe 3.14.3s Yes
Operating System cisco ios_xe 3.14.4s Yes
Operating System cisco ios_xe 3.15.0s Yes
Operating System cisco ios_xe 3.15.1cs Yes
Operating System cisco ios_xe 3.15.1s Yes
Operating System cisco ios_xe 3.15.1xbs Yes
Operating System cisco ios_xe 3.15.2s Yes
Operating System cisco ios_xe 3.15.2xbs Yes
Operating System cisco ios_xe 3.15.3s Yes
Operating System cisco ios_xe 3.15.4s Yes
Operating System cisco ios_xe 3.16.0as Yes
Operating System cisco ios_xe 3.16.0bs Yes
Operating System cisco ios_xe 3.16.0cs Yes
Operating System cisco ios_xe 3.16.0s Yes
Operating System cisco ios_xe 3.16.1as Yes
Operating System cisco ios_xe 3.16.1s Yes
Operating System cisco ios_xe 3.16.2as Yes
Operating System cisco ios_xe 3.16.2bs Yes
Operating System cisco ios_xe 3.16.2s Yes
Operating System cisco ios_xe 3.16.3as Yes
Operating System cisco ios_xe 3.16.3s Yes
Operating System cisco ios_xe 3.16.4as Yes
Operating System cisco ios_xe 3.16.4bs Yes
Operating System cisco ios_xe 3.16.4cs Yes
Operating System cisco ios_xe 3.16.4ds Yes
Operating System cisco ios_xe 3.16.4es Yes
Operating System cisco ios_xe 3.16.4gs Yes
Operating System cisco ios_xe 3.16.4s Yes
Operating System cisco ios_xe 3.16.5as Yes
Operating System cisco ios_xe 3.16.5bs Yes
Operating System cisco ios_xe 3.16.5s Yes
Operating System cisco ios_xe 3.16.6bs Yes
Operating System cisco ios_xe 3.16.6s Yes
Operating System cisco ios_xe 3.16.7as Yes
Operating System cisco ios_xe 3.16.7bs Yes
Operating System cisco ios_xe 3.16.7s Yes
Operating System cisco ios_xe 3.16.8s Yes
Operating System cisco ios_xe 3.16.9s Yes
Operating System cisco ios_xe 3.16.10as Yes
Operating System cisco ios_xe 3.16.10s Yes
Operating System cisco ios_xe 3.17.0s Yes
Operating System cisco ios_xe 3.17.1as Yes
Operating System cisco ios_xe 3.17.1s Yes
Operating System cisco ios_xe 3.17.2s Yes
Operating System cisco ios_xe 3.17.3s Yes
Operating System cisco ios_xe 3.17.4s Yes
Operating System cisco ios_xe 3.18.0as Yes
Operating System cisco ios_xe 3.18.0s Yes
Operating System cisco ios_xe 3.18.0sp Yes
Operating System cisco ios_xe 3.18.1asp Yes
Operating System cisco ios_xe 3.18.1bsp Yes
Operating System cisco ios_xe 3.18.1csp Yes
Operating System cisco ios_xe 3.18.1gsp Yes
Operating System cisco ios_xe 3.18.1hsp Yes
Operating System cisco ios_xe 3.18.1isp Yes
Operating System cisco ios_xe 3.18.1s Yes
Operating System cisco ios_xe 3.18.1sp Yes
Operating System cisco ios_xe 3.18.2asp Yes
Operating System cisco ios_xe 3.18.2s Yes
Operating System cisco ios_xe 3.18.2sp Yes
Operating System cisco ios_xe 3.18.3asp Yes
Operating System cisco ios_xe 3.18.3bsp Yes
Operating System cisco ios_xe 3.18.3s Yes
Operating System cisco ios_xe 3.18.3sp Yes
Operating System cisco ios_xe 3.18.4s Yes
Operating System cisco ios_xe 3.18.4sp Yes
Operating System cisco ios_xe 3.18.5sp Yes
Operating System cisco ios_xe 3.18.6sp Yes
Operating System cisco ios_xe 3.18.7sp Yes
Operating System cisco ios_xe 3.18.8asp Yes
Operating System cisco ios_xe 3.18.8sp Yes
Operating System cisco ios_xe 16.1.1 Yes
Operating System cisco ios_xe 16.1.2 Yes
Operating System cisco ios_xe 16.1.3 Yes
Operating System cisco ios_xe 16.2.1 Yes
Operating System cisco ios_xe 16.2.2 Yes
Operating System cisco ios_xe 16.3.1 Yes
Operating System cisco ios_xe 16.3.1a Yes
Operating System cisco ios_xe 16.3.2 Yes
Operating System cisco ios_xe 16.3.3 Yes
Operating System cisco ios_xe 16.3.4 Yes
Operating System cisco ios_xe 16.3.5 Yes
Operating System cisco ios_xe 16.3.5b Yes
Operating System cisco ios_xe 16.3.6 Yes
Operating System cisco ios_xe 16.3.7 Yes
Operating System cisco ios_xe 16.3.8 Yes
Operating System cisco ios_xe 16.3.9 Yes
Operating System cisco ios_xe 16.3.10 Yes
Operating System cisco ios_xe 16.3.11 Yes
Operating System cisco ios_xe 16.4.1 Yes
Operating System cisco ios_xe 16.4.2 Yes
Operating System cisco ios_xe 16.4.3 Yes
Operating System cisco ios_xe 16.5.1 Yes
Operating System cisco ios_xe 16.5.1a Yes
Operating System cisco ios_xe 16.5.1b Yes
Operating System cisco ios_xe 16.5.2 Yes
Operating System cisco ios_xe 16.5.3 Yes
Operating System cisco ios_xe 16.6.1 Yes
Operating System cisco ios_xe 16.6.2 Yes
Operating System cisco ios_xe 16.6.3 Yes
Operating System cisco ios_xe 16.6.4 Yes
Operating System cisco ios_xe 16.6.4a Yes
Operating System cisco ios_xe 16.6.4s Yes
Operating System cisco ios_xe 16.6.5 Yes
Operating System cisco ios_xe 16.6.5a Yes
Operating System cisco ios_xe 16.6.5b Yes
Operating System cisco ios_xe 16.6.6 Yes
Operating System cisco ios_xe 16.6.7 Yes
Operating System cisco ios_xe 16.6.7a Yes
Operating System cisco ios_xe 16.6.8 Yes
Operating System cisco ios_xe 16.7.1 Yes
Operating System cisco ios_xe 16.7.1a Yes
Operating System cisco ios_xe 16.7.1b Yes
Operating System cisco ios_xe 16.7.2 Yes
Operating System cisco ios_xe 16.7.3 Yes
Operating System cisco ios_xe 16.7.4 Yes
Operating System cisco ios_xe 16.8.1 Yes
Operating System cisco ios_xe 16.8.1a Yes
Operating System cisco ios_xe 16.8.1b Yes
Operating System cisco ios_xe 16.8.1c Yes
Operating System cisco ios_xe 16.8.1d Yes
Operating System cisco ios_xe 16.8.1e Yes
Operating System cisco ios_xe 16.8.1s Yes
Operating System cisco ios_xe 16.8.2 Yes
Operating System cisco ios_xe 16.8.3 Yes
Operating System cisco ios_xe 16.9.1 Yes
Operating System cisco ios_xe 16.9.1a Yes
Operating System cisco ios_xe 16.9.1b Yes
Operating System cisco ios_xe 16.9.1c Yes
Operating System cisco ios_xe 16.9.1d Yes
Operating System cisco ios_xe 16.9.1s Yes
Operating System cisco ios_xe 16.9.2 Yes
Operating System cisco ios_xe 16.9.2a Yes
Operating System cisco ios_xe 16.9.2s Yes
Operating System cisco ios_xe 16.9.3 Yes
Operating System cisco ios_xe 16.9.3a Yes
Operating System cisco ios_xe 16.9.3h Yes
Operating System cisco ios_xe 16.9.3s Yes
Operating System cisco ios_xe 16.9.4 Yes
Operating System cisco ios_xe 16.9.4c Yes
Operating System cisco ios_xe 16.9.5 Yes
Operating System cisco ios_xe 16.9.5f Yes
Operating System cisco ios_xe 16.9.6 Yes
Operating System cisco ios_xe 16.10.1 Yes
Operating System cisco ios_xe 16.10.1a Yes
Operating System cisco ios_xe 16.10.1b Yes
Operating System cisco ios_xe 16.10.1c Yes
Operating System cisco ios_xe 16.10.1d Yes
Operating System cisco ios_xe 16.10.1e Yes
Operating System cisco ios_xe 16.10.1f Yes
Operating System cisco ios_xe 16.10.1g Yes
Operating System cisco ios_xe 16.10.1s Yes
Operating System cisco ios_xe 16.10.2 Yes
Operating System cisco ios_xe 16.10.3 Yes
Operating System cisco ios_xe 16.11.1 Yes
Operating System cisco ios_xe 16.11.1a Yes
Operating System cisco ios_xe 16.11.1b Yes
Operating System cisco ios_xe 16.11.1c Yes
Operating System cisco ios_xe 16.11.1s Yes
Operating System cisco ios_xe 16.11.2 Yes
Operating System cisco ios_xe 16.12.1 Yes
Operating System cisco ios_xe 16.12.1a Yes
Operating System cisco ios_xe 16.12.1c Yes
Operating System cisco ios_xe 16.12.1s Yes
Operating System cisco ios_xe 16.12.1t Yes
Operating System cisco ios_xe 16.12.1w Yes
Operating System cisco ios_xe 16.12.1x Yes
Operating System cisco ios_xe 16.12.1y Yes
Operating System cisco ios_xe 16.12.1z Yes
Operating System cisco ios_xe 16.12.1z1 Yes
Operating System cisco ios_xe 16.12.1za Yes
Operating System cisco ios_xe 16.12.2 Yes
Operating System cisco ios_xe 16.12.2a Yes
Operating System cisco ios_xe 16.12.2s Yes
Operating System cisco ios_xe 16.12.2t Yes
Operating System cisco ios_xe 16.12.3 Yes
Operating System cisco ios_xe 16.12.3a Yes
Operating System cisco ios_xe 16.12.3s Yes
Operating System cisco ios_xe 16.12.4 Yes
Operating System cisco ios_xe 16.12.4a Yes
Operating System cisco ios_xe 17.1.1 Yes
Operating System cisco ios_xe 17.1.1a Yes
Operating System cisco ios_xe 17.1.1s Yes
Operating System cisco ios_xe 17.1.1t Yes
Operating System cisco ios_xe 17.1.2 Yes
Operating System cisco ios_xe 17.2.1 Yes
Operating System cisco ios_xe 17.2.1a Yes
Operating System cisco ios_xe 17.2.1r Yes
Operating System cisco ios_xe 17.2.1v Yes
Operating System cisco ios_xe 17.2.2 Yes
Operating System cisco ios_xe 17.2.3 Yes
Operating System cisco ios_xe 17.3.1 Yes
Operating System cisco ios_xe 17.3.1a Yes
Operating System cisco ios_xe 17.3.1w Yes
References