CVE-2021-1446

Katalog CVE

CVSS 7.5 · High EPSS 1,5%

Kerentanan Improper Check for Unusual or Exceptional Conditions pada cisco ios xe. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

24 Maret 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-754: Improper Check for Unusual or Exceptional Conditions

EPSS (30 hari)

1,5% peluang dieksploitasi; lebih tinggi dari 74,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD. Ditampilkan 60 dari 265 konfigurasi; daftar lengkap ada di NVD.

Referensi dan perbaikan

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-alg-dos-hbBS7SZE advisory vendor