CVE-2021-1446
published 2021-03-24CVE-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…
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.49%
71.3th percentile
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.
Affected
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| cisco | cisco_ios_xe_software | — | — |
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CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.07.1HIGHAV:N/AC:M/Au:N/C:N/I:N/A:C
vendor_cisco8.6HIGH
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CISA ICS
Rockwell Automation Stratix Devices Containing Cisco IOS
cisa_ics·2022-10-27·CVSS 7.7
[HIGH] Rockwell Automation Stratix Devices Containing Cisco IOS
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Rockwell Automation Stratix Devices Containing Cisco IOS
Last RevisedOctober 27, 2022
Alert CodeICSA-22-300-03
## 1. EXECUTIVE SUMMARY
- CVSS v3 8.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Rockwell Automation
- Equipment: Stratix Devices
- Vulnerabilities: Incorrect Authorization, Improper Input Validation, Improper Check for Unusual or Exceptional Conditions, Interpretation Conflict, OS Command Injection, Improper Verification of Cryptographic Signature, Path Traversal
## 2. RISK EVALUATION
Successful exploitation of these vulnerabilities could l
Cisco
Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
vendor_cisco·2021-03-24·CVSS 8.6
CVE-2021-1446 [HIGH] CWE-754 Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
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
Cisco
Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2021-1446 Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
CVE-2021-1446: Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability
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 sen
GHSA
GHSA-m3m6-h5x2-mhf5: A vulnerability in the DNS application layer gateway (ALG) functionality used by Network Address Translation (NAT) in Cisco IOS XE Software could allo
ghsa_unreviewed·2022-05-24
CVE-2021-1446 [HIGH] CWE-754 GHSA-m3m6-h5x2-mhf5: A vulnerability in the DNS application layer gateway (ALG) functionality used by Network Address Translation (NAT) in Cisco IOS XE Software could allo
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-03-24
Published