CVE-2022-20653 is a denial-of-service vulnerability in the DANE email verification component of Cisco AsyncOS Software for Cisco Email Security Appliances. An unauthenticated, remote attacker can exploit insufficient error handling in DNS name resolution by sending specially crafted email messages. This vulnerability carries a CVSS score of 7.5 (High), indicating it can be exploited remotely with low complexity, leading to a complete loss of availability for the affected device. While there are no public exploit codes or active exploitation reported, the vulnerability has garnered significant community discussion and media coverage, suggesting awareness among threat actors.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 13.0.3CPE matchmatch criteria | cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* | ||
>= 13.5.0, < 13.5.4.102CPE matchmatch criteria | cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* | ||
>= 14.0, < 14.0.2.020CPE matchmatch criteria | cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.