Attacker Value
Very High
(1 user assessed)
Exploitability
Unknown
(1 user assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
2

CVE-2024-40711

Disclosure Date: September 07, 2024 •
CVE-2024-40711 CVSS v3 Base Score: 9.8
Exploited in the Wild
Reported by cwyre-r7
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Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).

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1
Ratings
  • Attacker Value
    Very High
CISA KEV ListedCommon in enterpriseGives privileged accessObserved in ransomware attacksUnauthenticated
Technical Analysis

Critical unauthenticated remote code execution vulnerability in Veeam Backup & Replication, a perennially popular target for abuse (including by ransomware groups). Rapid7 has a blog here on this vulnerability, as well as other Veeam vulns patched over the summer of 2024.

CVE-2024-40711 is being exploited by multiple ransomware crews, including Akira, Fog, and a new group called Frag, per Sophos X-Ops. Sophos’s blog on exploitation notes they began seeing MDR cases in October 2024. The CVE was added to CISA KEV on October 17, roughly 7 weeks after it was disclosed. Cybersecurity Dive has some solid additional context here.

Veeam Backup & Replication generally shouldn’t be exposed to the internet, but several technical reports have noted that this bug is still a great target for attackers who purchase initial access to corporate networks from access brokers. Public proof-of-concept code is available. Patch this one on an emergency basis if you haven’t already.

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CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Backup and Recovery 12.1.2
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • veeam

Products

  • veeam backup & replication

Exploited in the Wild

Reported by:

References

Canonical
CVE-2024-40711 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-40711)
Exploit
PoCs that have not been added by contributors directly have been sourced from: nomi-sec/PoC-in-GitHub.
A PoC added here by the AKB Worker must have at least 2 GitHub stars.
CVE-2024-40711 (https://github.com/watchtowrlabs/CVE-2024-40711) (Added by AKB Worker)
CVE-2024-40711-Exp (https://github.com/realstatus/CVE-2024-40711-Exp) (Added by AKB Worker)
Miscellaneous
https://www.veeam.com/kb4649

Additional Info

Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Technical Analysis