Security readout for executives and security teams
Plain-English summary
This affects older Windows installations of CPython. A flaw in Python's os.symlink() handling could allow code execution and likely privilege escalation when a script creates a symlink using attacker-controlled input. Systems on Python 3.6.5, 3.7.0, or later are described as fixed.
Executive priority
Prioritize remediation where old Python runtimes run on Windows servers, developer workstations, build systems, or automation hosts. Business urgency is highest when those systems execute untrusted scripts or process user-controlled file paths.
Technical view
CVE-2018-1000117 is a Windows-specific CPython buffer overflow in os.symlink(), affecting versions from 3.2 through 3.6.4. The reported trigger is a Python script creating a symlink with attacker-controlled name or location. The bundle identifies fixes in 3.6.5 and 3.7.0.
Likely exposure
Exposure is limited to Windows systems running CPython 3.2 through 3.6.4, especially where Python scripts can process attacker-controlled paths or symlink names. The provided affected-product metadata is incomplete and does not identify downstream bundled Python distributions.
Exploitation context
The source bundle describes exploitability through a Python script creating a symlink with attacker-controlled name or location. It does not provide evidence of active exploitation, and KEV status is false, so active exploitation should not be assumed.
Researcher notes
The record lacks CVSS, CWE, and precise downstream product metadata. Analysis should focus on Windows CPython version exposure and reachable os.symlink() usage. Do not infer Linux, macOS, or bundled-product impact without separate vendor evidence.
Mitigation direction
- Upgrade affected Windows CPython to 3.6.5, 3.7.0, or later.
- Remove unsupported Python 3.2 through 3.6.4 runtimes from Windows hosts.
- Review vendor guidance for bundled or embedded Python distributions.
- Limit execution of untrusted Python scripts on affected Windows systems.
- Avoid passing attacker-controlled paths into symlink creation logic.
Validation and detection
- Inventory Windows hosts for CPython versions 3.2 through 3.6.4.
- Check applications that bundle their own Python runtime on Windows.
- Review code paths using os.symlink() with user-influenced input.
- Confirm upgraded runtimes report Python 3.6.5, 3.7.0, or later.
- Document any remaining legacy interpreters and compensating controls.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-1000117 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/python/cpython/pull/5989CVE reference · x_refsource_CONFIRM
- https://bugs.python.org/issue33001CVE reference · x_refsource_CONFIRM
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.