hushline: Improper Authentication
CVE-2024-38523 is a high-severity improper authentication vulnerability in hushline from Scidsg, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 0.1.0 as the first without the flaw, so updating hushline to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.52% 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
- Update hushline to 0.1.0 or a later version.
- Read the advisory on github.com for workarounds and exact fixed builds.
Affected products and versions
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
- HighSuccess depends on conditions outside the attacker's control.
- 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:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (github.com).
Official description
Hush Line is a free and open-source, anonymous-tip-line-as-a-service for organizations or individuals. The TOTP authentication flow has multiple issues that weakens its one-time nature. Specifically, the lack of 2FA for changing security settings allows attacker with CSRF or XSS primitives to change such settings without user interaction and credentials are required. This vulnerability has been patched in version 0.10.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
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
Other vulnerabilities in hushline
- 7.1 High severity
Recent Improper Authentication vulnerabilities
- 8.8 High severity
- 8.6 High severity
- 9.8 Critical severity
- 9.1 Critical severity
- 7.2 High severity
VMware ESXi Authentication Bypass Exploited
- 8.2 High severity
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