Security readout for executives and security teams
Plain-English summary
CVE-2021-38614 is a denial-of-service risk in unsupported Polipo proxy versions through 1.1.1. A specially malformed Range header can trigger a heap buffer overflow when the software was built with NDEBUG, potentially crashing the service.
Executive priority
Prioritize removal or containment if Polipo is internet-facing or used by untrusted clients. The product is no longer maintainer-supported, making long-term remediation a replacement decision rather than a routine patch cycle.
Technical view
The issue is a CWE-787 heap-based buffer overflow in Polipo Range header parsing, conditional on NDEBUG builds. CVSS 3.1 is 7.5: network reachable, low complexity, no privileges, no user interaction, with availability impact only.
Likely exposure
Exposure is most likely in legacy environments still running Polipo through 1.1.1. The source bundle does not provide CPEs, package names, or supported downstream product mappings, so inventory confirmation is required.
Exploitation context
The bundle does not show CISA KEV listing or any cited active exploitation evidence. The issue is remotely reachable if Polipo accepts untrusted HTTP proxy traffic, but public exploit status is not established here.
Researcher notes
Evidence supports availability impact from Range header parsing in NDEBUG builds. The affected-product metadata is incomplete in the bundle, and no official fix is named. Avoid assuming impact beyond Polipo through 1.1.1 without local build and package evidence.
Mitigation direction
- Retire or replace unsupported Polipo where possible.
- Check operating system or package maintainer guidance for available downstream fixes.
- Restrict Polipo access to trusted networks only.
- Treat NDEBUG-built Polipo through 1.1.1 as affected until proven otherwise.
- Monitor for unexpected Polipo crashes or restarts.
Validation and detection
- Inventory hosts for Polipo installations and versions through 1.1.1.
- Confirm whether deployed binaries were built with NDEBUG.
- Review network paths exposing Polipo to untrusted clients.
- Check service logs and supervisors for crash patterns.
- Document unsupported instances for replacement planning.
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-787: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-38614 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.openwall.com/lists/oss-security/2021/07/28/2CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.