CVE-2021-34741
published 2021-11-04CVE-2021-34741: A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.25%
66.0th percentile
A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email through Cisco ESA. A successful exploit could allow the attacker to exhaust all the available CPU resources on an affected device for an extended period of time, preventing other emails from being processed and resulting in a DoS condition.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | asyncos | < 13.0.4 | 13.0.4 |
| cisco | asyncos | — | — |
| cisco | asyncos | — | — |
| cisco | cisco_email_security_appliance | — | — |
| cisco | email_security_appliance | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
vendor_cisco7.5HIGH
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GHSA
GHSA-mcrm-m53h-jvp2: A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, rem
ghsa_unreviewed·2022-05-24
CVE-2021-34741 [HIGH] CWE-20 GHSA-mcrm-m53h-jvp2: A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, rem
A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email through Cisco ESA. A successful exploit could allow the attacker to exhaust all the available CPU resources on an affected device for an extended period of time, preventing other emails from being processed and resulting in a DoS condition.
Cisco
Cisco Email Security Appliance Denial of Service Vulnerability
vendor_cisco·2021-11-03·CVSS 7.5
CVE-2021-34741 [HIGH] CWE-770 Cisco Email Security Appliance Denial of Service Vulnerability
Cisco Email Security Appliance Denial of Service Vulnerability
A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack against an affected device.
This vulnerability is due to insufficient input validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email through Cisco ESA. A successful exploit could allow the attacker to exhaust all the available CPU resources on an affected device for an extended period of time, preventing other emails from being processed and resulting in a DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that address t
Cisco
Cisco Email Security Appliance Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2021-34741 Cisco Email Security Appliance Denial of Service Vulnerability
CVE-2021-34741: Cisco Email Security Appliance Denial of Service Vulnerability
A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email through Cisco ESA. A successful exploit could allow the attacker to exhaust all the available CPU resources on an affected device for an extended period of time, preventing other emails from being processed and resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no
CVSS: 3.1
CW
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-11-04
Published