CVE-2021-34698
CVSS V2 High 7.8
CVSS V3 High 7.5
Description
A vulnerability in the proxy service of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management in the proxy service of an affected device. An attacker could exploit this vulnerability by establishing a large number of HTTPS connections to the affected device. A successful exploit could allow the attacker to cause the system to stop processing new connections, which could result in a DoS condition. Note: Manual intervention may be required to recover from this situation.
Overview
- CVE ID
- CVE-2021-34698
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-10-06T20:15:08
- Last Modified Date
- 2021-10-14T21:15:25
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* | 1 | OR | 12.0 | 12.0.3-005 |
| cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* | 1 | OR | 12.5 | 12.5.2-007 |
| cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* | 1 | OR | 14.0 | 14.0.1-014 |
| cpe:2.3:h:cisco:web_security_appliance_s170:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:web_security_appliance_s190:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:web_security_appliance_s380:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:web_security_appliance_s390:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:web_security_appliance_s680:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:web_security_appliance_s690:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:web_security_appliance_s690x:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:C
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- COMPLETE
- Base Score
- 7.8
- Severity
- HIGH
- Exploitability Score
- 10
- Impact Score
- 6.9
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-wsa-dos-fmHdKswk | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-34698 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34698 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:51:37 | Added to TrackCVE | |||
| 2022-12-05 11:56:55 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-05 11:56:55 | 2021-10-06T20:15Z | 2021-10-06T20:15:08 | CVE Published Date | updated |
| 2022-12-05 11:56:55 | 2021-10-14T21:15:25 | CVE Modified Date | updated | |
| 2022-12-05 11:56:55 | Analyzed | Vulnerability Status | updated |