CASS: Missing Cryptographic Step
CVE-2022-29229 is a high-severity missing cryptographic step vulnerability in CASS from Cassproject, 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. Affected CASS versions: < 1.5.8. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.35% 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 Competency And Skills System to 1.5.8 or a later version.
- Read the advisory on github.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Cassproject | CASS | < 1.5.8 | Not stated |
| Cassproject | Competency And Skills System | before 1.5.8 | 1.5.8 |
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 | 6.3 | Medium | CNA (github.com) |
| CVSS 3.1 | 7.2 | High | NVD |
| CVSS 2.0 | 6.5 | Medium | NVD |
Official description
CaSS is a Competency and Skills System. CaSS Library, (npm:cassproject) has a missing cryptographic step when storing cryptographic keys that can allow a server administrator access to an account’s cryptographic keys. This affects CaSS servers using standalone username/password authentication, which uses a method that expects e2e cryptographic security of authorization credentials. The issue has been patched in 1.5.8, however, the vulnerable accounts are only resecured when the user next logs in using standalone authentication, as the data required to resecure the account is not available to the server. The issue may be mitigated by using SSO or client side certificates to log in. Please note that SSO and client side certificate authentication does not have this expectation of no-knowledge credential access, and cryptographic keys are available to the server administrator.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Cryptographic Step
The product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- github.com/cassproject/CASS/security/advisories/GHSA-7qcx-4p32-qcmxThird Party Advisory
Patches and release notes
- github.com/cassproject/CASS/releases/tag/1.5.8Third Party Advisory
Recent Missing Cryptographic Step vulnerabilities
- 7.4 High severity
- 7.5 High severity
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