Access Rights Manager: Deserialization of Untrusted Data
CVE-2023-40057 is a critical-severity deserialization of untrusted data vulnerability in Access Rights Manager from SolarWinds, with a CVSS 3.1 base score of 9.0 out of 10. It can be exploited from the same local network by an attacker with a low-privileged account, without any action from a user. The record lists version 2023.2.2 as the first without the flaw, so updating Access Rights Manager to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 4.85% chance of exploitation within 30 days, which is in the top 7.83% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Access Rights Manager to 2023.2.2 or a later version.
- Read the advisory on solarwinds.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SolarWinds | Access Rights Manager | previous versions through 2023.2.2; before 2023.2.2 | 2023.2.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (solarwinds.com).
Official description
The SolarWinds Access Rights Manager was found to be susceptible to a Remote Code Execution Vulnerability. If exploited, this vulnerability allows an authenticated user to abuse a SolarWinds service resulting in remote code execution.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
How developers prevent this class of flaw
- If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
- When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
- Explicitly define a final object() to prevent deserialization.
More Deserialization of Untrusted Data vulnerabilities (CWE-502)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Access Rights Manager
- 8.8 High severity
- 8.0 High severity
- 8.8 High severity
- 8.3 High severity
- 8.3 High severity
- 8.8 High severity
Recent Deserialization of Untrusted Data vulnerabilities
- 8.0 High severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
Spotted an error? Tell us.