CVE-2021-27876

Published on: 03/01/2021 12:00:00 AM UTC

Last Modified on: 09/27/2022 08:14:00 PM UTC

CVE-2021-27876

CVSS:3.1/AC:L/AV:N/A:N/C:H/I:H/PR:L/S:U/UI:N

Certain versions of Backup Exec from Veritas contain the following vulnerability:

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.

CVE-2021-27876 has been assigned by [email protected] to track the vulnerability - currently rated as HIGH severity.

CVSS3 Score: 8.1 - HIGH

Attack Vector ^ⓘ	Attack Complexity	Privileges Required	User Interaction
NETWORK	LOW	LOW	NONE
Scope	Confidentiality Impact	Integrity Impact	Availability Impact
UNCHANGED	HIGH	HIGH	NONE

CVSS2 Score: 7.5 - HIGH

Access Vector^ⓘ	Access Complexity	Authentication
NETWORK	LOW	SINGLE
Confidentiality Impact	Integrity Impact	Availability Impact
COMPLETE	PARTIAL	NONE

CVE References

Description	Tags ^ⓘ	Link
Veritas Backup Exec Agent Remote Code Execution ≈ Packet Storm	packetstormsecurity.com text/html	MISC packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html
Security Advisory for Backup Exec version 21.2 \| Veritas™	Vendor Advisory www.veritas.com text/html	MISC www.veritas.com/content/support/en_US/security/VTS21-001#issue2

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There are currently no QIDs associated with this CVE

Known Affected Configurations (CPE V2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Veritas	Backup Exec	All	All	All	All
Application	Veritas	Backup Exec	All	All	All	All

cpe:2.3:a:veritas:backup_exec:*:*:*:*:*:*:*:*:
cpe:2.3:a:veritas:backup_exec:*:*:*:*:*:*:*:*:

No vendor comments have been submitted for this CVE

Social Mentions

Source	Title	Posted (UTC)
@RemotelyAlerts	Severity: ??? \| An issue was discovered in Veritas Backu... \| CVE-2021-27876 \| Link for more: alerts.remotelyrmm.com/CVE-2021-27876	2022-09-26 19:29:48