Veritas Backup Exec up to 21.1 TLS Communication input improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Veritas Backup Exec up to 21.1. It has been classified as critical. This impacts an unknown function of the component TLS Communication Handler. Performing a manipulation of the argument input results in improper authentication. This vulnerability was named CVE-2021-27876. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Veritas Backup Exec up to 21.1 (Backup Software). This affects an unknown code block of the component TLS Communication Handler. The manipulation of the argument input with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 03/02/2021. The advisory is shared at veritas.com. This vulnerability is uniquely identified as CVE-2021-27876. Technical details and a public exploit are known.

The exploit is shared for download at packetstormsecurity.com. It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 04/07/2023 with a due date of 04/28/2023:

Apply updates per vendor instructions.

Upgrading to version 21.2 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CNA Base Score: 8.1
CNA Vector (MITRE): 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Veritas Backup Exec 21.2

Timelineinfo

03/01/2021 🔍
03/02/2021 +1 days 🔍
03/02/2021 +0 days 🔍
03/07/2025 +1466 days 🔍

Sourcesinfo

Advisory: veritas.com
Status: Confirmed

CVE: CVE-2021-27876 (🔍)
GCVE (CVE): GCVE-0-2021-27876
GCVE (VulDB): GCVE-100-170553
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/02/2021 08:10
Updated: 03/07/2025 17:17
Changes: 03/02/2021 08:10 (39), 03/06/2021 07:39 (5), 03/06/2021 07:43 (1), 03/14/2021 09:31 (7), 04/28/2024 12:04 (27), 06/29/2024 14:20 (2), 09/27/2024 13:49 (2), 03/07/2025 17:17 (21)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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