CVE-2021-1236
CVSS V2 Medium 5
CVSS V3 Medium 5.3
Description
Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.
Overview
- CVE ID
- CVE-2021-1236
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Modified
- Published Version
- 2021-01-13T22:15:20
- Last Modified Date
- 2023-02-19T04:15:12
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* | 1 | OR | 17.4.1 | |
| cpe:2.3:h:cisco:csr_1000v:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isa_3000:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1100-4p:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1100-8p:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1101-4p:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1109-2p:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1109-4p:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1111x-8p:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4221:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4321:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4331:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4351:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4431:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4451-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_4461:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:cisco:firepower_management_center:2.9.14.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:firepower_management_center:2.9.14.14:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:firepower_management_center:2.9.15:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:firepower_management_center:2.9.16:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:firepower_management_center:2.9.17:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* | 1 | OR | 6.5.0.5 | |
| AND | ||||
| cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:* | 1 | OR | 2.9.14 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- 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:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 1.4
References
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-1236 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1236 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:26:57 | Added to TrackCVE | |||
| 2022-12-05 20:09:49 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-05 20:09:49 | 2021-01-13T22:15Z | 2021-01-13T22:15:20 | CVE Published Date | updated |
| 2022-12-05 20:09:49 | 2021-01-19T18:35:01 | CVE Modified Date | updated | |
| 2022-12-05 20:09:49 | Analyzed | Vulnerability Status | updated | |
| 2023-02-11 03:12:53 | 2023-02-11T02:20:43 | CVE Modified Date | updated | |
| 2023-02-11 03:12:53 | Analyzed | Modified | Vulnerability Status | updated |
| 2023-02-11 03:12:53 | References | updated | ||
| 2023-02-19 05:12:05 | 2023-02-19T04:15:12 | CVE Modified Date | updated | |
| 2023-02-19 05:12:06 | References | updated |