CVE-2021-27876
CVSS V2 High 7.5
CVSS V3 High 8.1
Description
An issue was discovered in Veritas Backup Exec before 21.2. The communication between a client and an Agent requires successful authentication, which is typically completed over a secure TLS communication. However, due to a vulnerability in the SHA Authentication scheme, an attacker is able to gain unauthorized access and complete the authentication process. Subsequently, the client can execute data management protocol commands on the authenticated connection. By using crafted input parameters in one of these commands, an attacker can access an arbitrary file on the system using System privileges.
Overview
- CVE ID
- CVE-2021-27876
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-01T22:15:14
- Last Modified Date
- 2022-09-27T20:14:17
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:veritas:backup_exec:*:*:*:*:*:*:*:* | 1 | OR | 21.2 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:C/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 7.5
- Severity
- HIGH
- Exploitability Score
- 8
- Impact Score
- 7.8
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 8.1
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| http://packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html | Exploit Third Party Advisory VDB Entry |
| https://www.veritas.com/content/support/en_US/security/VTS21-001#issue2 | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-27876 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27876 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:20:44 | Added to TrackCVE | |||
| 2022-12-05 22:58:18 | 2021-03-01T22:15Z | 2021-03-01T22:15:14 | CVE Published Date | updated |
| 2022-12-05 22:58:18 | 2022-09-27T20:14:17 | CVE Modified Date | updated | |
| 2022-12-05 22:58:18 | Analyzed | Vulnerability Status | updated | |
| 2022-12-05 22:58:22 | References | updated |