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

CVE-2023-26258

Disclosure Date: July 03, 2023 •
CVE-2023-26258 CVSS v3 Base Score: 9.8
Add MITRE ATT&CK tactics and techniques that apply to this CVE.
Credential Access
Techniques
Validation
Validated
Initial Access
Techniques
Validation
Validated

Description

Arcserve UDP through 9.0.6034 allows authentication bypass. The method getVersionInfo at WebServiceImpl/services/FlashServiceImpl leaks the AuthUUID token. This token can be used at /WebServiceImpl/services/VirtualStandbyServiceImpl to obtain a valid session. This session can be used to execute any task as administrator.

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1
Ratings
  • Attacker Value
    Very High
  • Exploitability
    Very High
Common in enterpriseEasy to weaponizeGives privileged accessUnauthenticatedVulnerable in default configuration
Technical Analysis

Remote Code Execution in ArcServe UDP Backup

A critical authentication bypass exists in ArcServe UDP Backup that affects versions 7.0 to 9.0.
By interacting with the service manipulating SOAP requests, it is possible to retrieve first details about the system including OS version, hostname, domain and administrator account name.

By forging a valid admin session with the discovered AuthUUID – ArcServe has an option to retrieve the admin password using the getLocalHostAsTrust method and request that from the ArcServe application.

The ArcServe application will return the value of the encrypted password that can be decrypted using the scripts provided by the authors of this vulnerability ( and in the reference link of this submission).

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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
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • arcserve

Products

  • udp

Additional Info

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