Exploited vulnerability · CISA KEV

Is CVE-2023-27532 exploited? Yes: in CISA KEV since 22 Aug 2023

Gociux · Veeam Backup & Replication · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-27532, Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 22 Aug 2023, 165 days after it was published. It is known to be used in ransomware campaigns. It affects Veeam Backup & Replication. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 22 Aug 2023

ransomwareKnownused in campaigns

EPSStop 1%among the most likely CVEs to be exploited

severity7.5CVSS 3.1 · high

US federal due12 Sep 2023BOD 22-01 deadline

What it is

Veeam Backup & Replication Cloud Connect component contains a missing authentication for critical function vulnerability that allows an unauthenticated user operating within the backup infrastructure network perimeter to obtain encrypted credentials stored in the configuration database. This may lead to an attacker gaining access to the backup infrastructure hosts.

Vendor	Veeam (4 exploited CVEs in KEV)
Product	Backup & Replication
Vulnerability	Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function Vulnerability
Weakness	CWE-306
Published	10 Mar 2023
Added to KEV	22 Aug 2023
Reported by (CNA)	hackerone

What to do

Check whether you run it. Look for Backup & Replication in your asset inventory, including appliances and cloud images. Stack check lists every exploited Veeam CVE at once.
Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 10 Mar 2023.
Get told next time. Email alerts when CISA adds a CVE for Veeam.

Other exploited CVEs in Backup & Replication

CVE-2024-40711: Veeam Backup and Replication Deserialization Vulnerability (17 Oct 2024)
CVE-2022-26500: Veeam Backup & Replication Remote Code Execution Vulnerability (13 Dec 2022)
CVE-2022-26501: Veeam Backup & Replication Remote Code Execution Vulnerability (13 Dec 2022)

References

Questions

Is CVE-2023-27532 being exploited?

Yes. CISA added CVE-2023-27532 to the Known Exploited Vulnerabilities catalog on 22 Aug 2023, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-27532 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2023-27532?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Veeam's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Backup & Replication and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in August 2023 · Veeam scorecard · act-now radar.

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