CVE-2021-34741
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
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.
Overview
- CVE ID
- CVE-2021-34741
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-11-04T16:15:08
- Last Modified Date
- 2022-10-27T16:42:12
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* | 1 | OR | 13.0.4 | |
| cpe:2.3:o:cisco:asyncos:13.5.3-010:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:cisco:asyncos:13.7.0-093:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:m170:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m190:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m380:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m390:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m390x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m680:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m690:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:m690x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:s195:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:s395:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:s695:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-JOm9ETfO | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-34741 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34741 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:47:22 | Added to TrackCVE | |||
| 2022-12-05 13:50:25 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-05 13:50:25 | 2021-11-04T16:15Z | 2021-11-04T16:15:08 | CVE Published Date | updated |
| 2022-12-05 13:50:25 | 2022-10-27T16:42:12 | CVE Modified Date | updated | |
| 2022-12-05 13:50:25 | Analyzed | Vulnerability Status | updated |