CVE-2021-3618
CVSS V2 Medium 5.8
CVSS V3 High 7.4
Description
ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.
Overview
- CVE ID
- CVE-2021-3618
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2022-03-23T20:15:09
- Last Modified Date
- 2023-02-09T02:03:34
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* | 1 | OR | 1.21.0 | |
| cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:* | 1 | OR | 8.17 | |
| cpe:2.3:a:vsftpd_project:vsftpd:*:*:*:*:*:*:*:* | 1 | OR | 3.0.4 | |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:P/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 5.8
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 7.4
- Base Severity
- HIGH
- Exploitability Score
- 2.2
- Impact Score
- 5.2
References
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-3618 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3618 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-04-04 00:42:33 | Added to TrackCVE | |||
| 2022-12-06 13:07:50 | 2022-03-23T20:15Z | 2022-03-23T20:15:09 | CVE Published Date | updated |
| 2022-12-06 13:07:50 | 2022-11-23T02:15:09 | CVE Modified Date | updated | |
| 2022-12-06 13:07:50 | Undergoing Analysis | Vulnerability Status | updated | |
| 2023-02-09 02:11:48 | 2023-02-09T02:03:34 | CVE Modified Date | updated | |
| 2023-02-09 02:11:48 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |