JSCAPE MFT Server: Deserialization of Untrusted Data
CVE-2023-4528 is a high-severity deserialization of untrusted data vulnerability in JSCAPE MFT Server from Redwood Software, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version 2023.1.9 as the first without the flaw, so updating JSCAPE MFT Server to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 31.9% chance of exploitation within 30 days, which is in the top 1.67% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update JSCAPE MFT Server to 2023.1.9 or a later version.
- Update Jscape Mft to 2023.1.9 or a later version.
- Read the advisory on jscape.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Redwood Software | JSCAPE MFT Server | before 2023.1.9 | 2023.1.9 |
| Redwood | Jscape Mft | before 2023.1.9 | 2023.1.9 |
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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- 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:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | NVD |
| CVSS 3.1 | 7.2 | High | CISA (ADP) |
Official description
Unsafe deserialization in JSCAPE MFT Server versions prior to 2023.1.9 (Windows, Linux, and MacOS) permits an attacker to run arbitrary Java code (including OS commands) via its management interface
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
Patches and release notes
- rapid7.com/blog/post/2023/09/07/cve-2023-4528-java-deserialization-vulnerability-in-jscape-mft-fixed/Mitigation, Third Party Advisory
Recent Deserialization of Untrusted Data vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 7.8 High severity
- 8.8 High severity
- 8.8 High severity
- 9.8 Critical severity
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