Traveler for Microsoft Outlook: Use of Unmaintained Third Party Components
CVE-2023-37524 is a high-severity use of unmaintained third party components vulnerability in Traveler for Microsoft Outlook from HCLSoftware, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected Traveler for Microsoft Outlook versions: <3.0.6. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.27% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Traveler for Microsoft Outlook you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on support.hcl-software.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| HCLSoftware | Traveler for Microsoft Outlook | <3.0.6 | Not stated |
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
- LocalThe attacker needs local access or must trick a user into running something.
- 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
- 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.7 | High | CNA (hcl.com) |
| CVSS 3.1 | 7.8 | High | NVD |
Official description
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to vulnerabilities due to .NET Framework 4.5 being out of service. Since .NET Framework 4.5 has reached end-of-life and no longer receives security updates, it may expose the application to publicly known security weaknesses through vulnerable third-party components.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Unmaintained Third Party Components
The product relies on third-party components that are not actively supported or maintained by the original developer or a trusted proxy for the original developer.
More Use of Unmaintained Third Party Components vulnerabilities (CWE-1104)
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
Recent Use of Unmaintained Third Party Components vulnerabilities
- 8.3 High severity
- 8.7 High severity
- 7.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.7 High severity
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