Security readout for executives and security teams
Plain-English summary
Ubuntu Server's Subiquity installer could write the LUKS full disk encryption password into logs when a user entered one. This is a confidentiality issue: encryption may still work, but retained or shared installer logs could expose the password to someone with access to those logs.
Executive priority
Low urgency unless installer logs were collected broadly or shared outside trusted administrators. Prioritize log exposure review and password rotation for affected encrypted servers.
Technical view
CVE-2020-11932 is CWE-532 in Canonical Subiquity. The recorded CVSS 3.1 score is 2.3, requiring local access and high privileges, with low confidentiality impact only. The source bundle does not specify affected versions or a named fixed release.
Likely exposure
Exposure is most likely on Ubuntu Server systems installed with affected Subiquity builds where LUKS full disk encryption was configured and installer logs were retained, exported, or shared.
Exploitation context
The CVE is not listed in KEV, and the provided sources do not claim active exploitation. Abuse requires access to relevant logs, likely local or operational log access, rather than remote network exploitation.
Researcher notes
Version evidence is incomplete in the provided bundle: affected versions are listed as unspecified, and no fixed release number is named. Analysis should stay scoped to Subiquity installer logging of entered LUKS passwords.
Mitigation direction
- Check Canonical guidance for affected Subiquity builds and fixed installer media.
- Use a Subiquity build containing Canonical's referenced fix for future installs.
- Treat historical installer logs as sensitive and restrict access.
- Remove unnecessary retained installer logs from endpoints and log stores.
- Rotate affected LUKS passwords if logs may have been exposed.
Validation and detection
- Inventory Ubuntu Server installs that used Subiquity with LUKS full disk encryption.
- Identify whether installer logs were retained, centralized, or shared externally.
- Confirm the installer media or Subiquity build includes the referenced fix.
- Review access controls on deployment logs and support bundles.
- Document any systems where LUKS passwords require rotation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-532: Exact CWE lookup
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Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-11932 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 2.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N0.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
2.3LowVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/CanonicalLtd/subiquity/commit/7db70650feaf513d7fb6f1ca07f2d670a0890613CVE reference · x_refsource_MISC
- https://aliceandbob.company/the-human-factor-in-an-economy-of-scale/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insertion of Sensitive Information into Log File
Insertion of Sensitive Information into Log File represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.