Background exploitation KEV catalog Ransomware No authentication
CVE-2023-27532

Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function Vulnerability

Vulnerability in Veeam Backup & Replication component allows encrypted credentials stored in the configuration database to be obtained. This may lead to gaining access to the backup infrastructure hosts.

CheckOps priority index
8.4/10 Patch within 24 h
Severity7.5
Probability8.1
Exploitation5/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 80.6% higher than 99.6% of CVEs
CVSS 3.1 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:
Exploited for 1,169 days 22 Aug 2023
CISA due date 12 Sept 2023 for US federal agencies

Exploitation probability EPSS · FIRST

05010026 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 5 / 5

  • KEV catalog (CISA)22 Aug 2023
  • Exploited in EUVD (ENISA)22 Aug 2023
  • Used by ransomwareyes
  • EPSS above 10 %80.6%
  • No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

Veeam Backup & ReplicationBackup & Replication
Affected versions
  • Fixed Versions: v12 (build 12.0.0.1420 P20230223)
  • 11a (build 11.0.1.1261 P20230227)
Weaknesses (CWE)

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

  5. EPSS peak: 81.3%

References

Other exploited vulnerabilities from the same vendor

  • CVE-2024-40711Veeam Backup and Replication Deserialization Vulnerability
    9.6 · Background exploitation
  • CVE-2022-26501Veeam Backup & Replication Remote Code Execution Vulnerability
    6.4 · Background exploitation
  • CVE-2022-26500Veeam Backup & Replication Remote Code Execution Vulnerability
    5.5 · Background exploitation

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities