Security readout for executives and security teams
Plain-English summary
A local Ubuntu user could make Apport include sensitive system file contents in a crash report. This is not remote code execution, but it can expose high-value secrets if vulnerable Apport versions remain installed on shared or multi-user systems.
Executive priority
Treat as a medium-priority confidentiality issue. Patch during normal vulnerability remediation windows, sooner for shared Ubuntu systems that may contain secrets or sensitive local files.
Technical view
CVE-2019-7307 is a CWE-367 TOCTTOU flaw in Apport’s handling of a user’s ~/.apport-ignore.xml. A local attacker can replace that file with a symlink, causing Apport to include another system file in the generated crash report.
Likely exposure
Ubuntu systems running Apport before the fixed package versions listed by Canonical are exposed, especially systems with local shell users or shared user access.
Exploitation context
The source bundle describes local exploitation requiring low privileges. It does not provide KEV status or cited evidence of active exploitation in the wild.
Researcher notes
The core issue is a local symlink race against Apport’s ignore-file read path. Impact depends on crash report creation and attacker access to the resulting report. No source in the bundle establishes active exploitation.
Mitigation direction
- Upgrade Apport to the fixed Ubuntu package version or later.
- Prioritize shared servers, developer workstations, and multi-user Ubuntu hosts.
- Review Canonical guidance for the specific Ubuntu release in use.
- Restrict unnecessary local user access where vulnerable systems cannot be updated quickly.
Validation and detection
- Inventory Ubuntu hosts with Apport installed or enabled.
- Compare installed Apport versions against Canonical’s fixed version list.
- Review crash report storage and upload exposure paths.
- Confirm remediation through package version evidence after updates.
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-367: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-7307 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/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:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N24Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source materials
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.
Time-of-check Time-of-use (TOCTOU) Race Condition
Time-of-check Time-of-use (TOCTOU) Race Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.