Red Hat Enterprise Linux: Public Key Re-Use for Signing both Debug and Production Code
CVE-2022-1665 is a high-severity public key re-use for signing both debug and production code vulnerability in Red Hat Enterprise Linux, with a CVSS 3.1 base score of 8.2 out of 10. It can be exploited with local access to the system by an attacker with administrator privileges, without any action from a user. Affected Red Hat Enterprise Linux versions: 8.6. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.28% 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 Red Hat Enterprise Linux you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on bugzilla.redhat.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Red Hat Enterprise Linux | Red Hat Enterprise Linux | 8.6 | Not stated |
| Red Hat | Enterprise Linux | 8.0 | 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
- HighAdministrator-level access is required first.
- 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:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.2 | High | NVD |
| CVSS 2.0 | 4.6 | Medium | NVD |
Official description
A set of pre-production kernel packages of Red Hat Enterprise Linux for IBM Power architecture can be booted by the grub in Secure Boot mode even though it shouldn't. These kernel builds don't have the secure boot lockdown patches applied to it and can bypass the secure boot validations, allowing the attacker to load another non-trusted code.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Public Key Re-Use for Signing both Debug and Production Code
The same public key is used for signing both debug and production code.
How developers prevent this class of flaw
- Use different keys for Production and Debug.
More Public Key Re-Use for Signing both Debug and Production Code vulnerabilities (CWE-1291)
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
Advisories
- bugzilla.redhat.com/show_bug.cgi?id=2089529Issue Tracking
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