CVE-2022-20837
CVSS V2 None
CVSS V3 High 8.6
Description
A vulnerability in the DNS application layer gateway (ALG) functionality that is used by Network Address Translation (NAT) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability is due to a logic error that occurs when an affected device inspects certain TCP DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through the affected device that is performing NAT for DNS packets. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on the affected device. Note: This vulnerability can be exploited only by sending IPv4 TCP packets through an affected device. This vulnerability cannot be exploited by sending IPv6 traffic.
Overview
- CVE ID
- CVE-2022-20837
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2022-10-10T21:15:10
- Last Modified Date
- 2022-10-13T19:59:35
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:asr_1000-esp100-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_1000-esp200-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:catalyst_8500:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:catalyst_8500-4qc:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 8.6
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-alg-dos-KU9Z8kFX |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2022-20837 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-20837 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-10-10 22:01:01 | Added to TrackCVE | |||
| 2022-12-07 05:56:52 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-07 05:56:52 | 2022-10-10T21:15Z | 2022-10-10T21:15:10 | CVE Published Date | updated |
| 2022-12-07 05:56:52 | 2022-10-13T19:59:35 | CVE Modified Date | updated | |
| 2022-12-07 05:56:52 | Analyzed | Vulnerability Status | updated |