Security readout for executives and security teams
Plain-English summary
This is a high-severity local vulnerability in Canonical apport. A flaw in how apport reads kernel process metadata could let a low-privileged local user affect confidentiality, integrity, and availability. The source bundle does not show active exploitation or fixed package details.
Executive priority
High priority for environments with shared Linux systems or local user access. The issue is not evidenced as actively exploited in the provided sources, but the impact rating and local privilege requirements justify scheduled remediation without delay.
Technical view
data/apport get_starttime() improperly parses /proc/pid/stat. The CVSS vector is local, low complexity, low privileges, no user interaction, scope changed, and high confidentiality, integrity, and availability impact. The cited data identifies affected apport versions but does not describe exploit mechanics.
Likely exposure
Exposure is likely limited to systems running affected Canonical apport versions: 2.20.1, 2.20.9, 2.20.11-0ubuntu27, or 2.20.11-0ubuntu50. The attack vector is local, so shared servers, developer workstations, and multi-user Linux systems deserve priority review.
Exploitation context
The source bundle does not include KEV listing or other evidence of active exploitation. Treat this as a serious local privilege-boundary risk, but do not assume internet-scale exploitation from the provided sources.
Researcher notes
Evidence is incomplete. The bundle names the parsing flaw, affected apport versions, CWE-20, and CVSS vector, but does not provide fixed versions, exploit status, or operational workarounds. Use Launchpad and Canonical records for definitive remediation data.
Mitigation direction
- Check Canonical and Ubuntu guidance for fixed apport package versions.
- Update affected apport packages through supported vendor channels.
- Prioritize multi-user systems and hosts allowing local shell access.
- Limit unnecessary local user access on vulnerable systems.
- Track remediation in asset and vulnerability management records.
Validation and detection
- Inventory installed apport package versions across Linux assets.
- Compare discovered versions against Canonical or Ubuntu fixed-version guidance.
- Confirm vulnerable versions are upgraded or otherwise addressed.
- Review whether affected systems permit untrusted local users.
- Record exceptions where vendor guidance is unavailable or incomplete.
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-20: 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-2021-25683 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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:L/UI:N/S:C/C:H/I:H/A:H26Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1912326CVE 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.