Vulnerability in Veritas Backup Exec
CVE-2021-27877
An issue was discovered in Veritas Backup Exec before 21.2. It supports multiple authentication schemes: SHA authentication is one of these. This authentication scheme is no longer used in current versions of the product, but hadn't yet been disabled. An attacker could remotely exploit this scheme to gain unauthorized access to an Agent and execute privileged commands.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.649 (99.2th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.649 · newest: 0.649 · change: 0.000
Affected products
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- www.veritas.com/content/support/en_US/security/VTS21-001 (Vendor Advisory)
- packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Exec… (Exploit, VDB Entry, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-27877?
- CVE-2021-27877 is a high-severity vulnerability in Veritas Backup Exec. CVSS score: 8.2/10. Published 2021-03-01.
- How severe is CVE-2021-27877?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2021-27877 known to be exploited?
- Yes. CVE-2021-27877 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-04-07), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.