CVE-2021-27878

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Summary

CVECVE-2021-27878
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-03-01 22:15:00 UTC
Updated2022-09-27 20:15:00 UTC
DescriptionAn 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. The attacker could use one of these commands to execute an arbitrary command on the system using system privileges.

Risk And Classification

EPSS: 0.012920000 probability, percentile 0.796210000 (date 2026-04-01)

CISA KEV: Listed on 2023-04-07; due 2023-04-28; ransomware use Known

Problem Types: CWE-287

CISA Known Exploited Vulnerability

VendorVeritas
ProductBackup Exec Agent
NameVeritas Backup Exec Agent Command Execution Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://www.veritas.com/support/en_US/security/VTS21-001; https://nvd.nist.gov/vuln/detail/CVE-2021-27878

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Veritas Backup Exec All All All All
Application Veritas Backup Exec All All All All

References

ReferenceSourceLinkTags
Veritas Backup Exec Agent Remote Code Execution ≈ Packet Storm MISC packetstormsecurity.com
Security Advisory for Backup Exec version 21.2 | Veritas™ MISC www.veritas.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 378370 Veritas Backup Exec Multiple Security Vulnerabilities (VTS21-001)
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